Consolidated Schedule of Investments In and Advances to Affiliates (Details)

v3.24.3

Consolidated Schedule of Investments In and Advances to Affiliates (Details) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
		Sep. 30, 2024		Sep. 30, 2023	Sep. 30, 2024		Sep. 30, 2023	Dec. 31, 2023
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 25,372		$ 435	$ 23,802		$ (24,986)
Amount of Unrealized Gain/(Loss)		(29,749)		(1,202)	(24,656)		30,415
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[1]				1,092,895
Ending balance	[2]	1,162,627			1,162,627
Control investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		546	57		2,223
Amount of Unrealized Gain/(Loss)		912		(735)	4,631		(1,433)
Amount of Interest, Fees or Dividends Credited to Income					2,643		2,321
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					53,644	[1],[3]	50,303
Gross Additions					5,126		16,819
Gross Reductions					1,937		13,056
Ending balance		56,833	[2],[4]	54,066	56,833	[2],[4]	54,066
Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		0		(2)	0		(7,188)
Amount of Unrealized Gain/(Loss)		182		4,780	1,166		22,468
Amount of Interest, Fees or Dividends Credited to Income					22,891		22,241
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					291,279	[1],[5]	277,000
Gross Additions					61,239		91,114
Gross Reductions					50,162		92,225
Ending balance		$ 315,190	[2],[6]	275,889	$ 315,190	[2],[6]	275,889
Investment, Identifier [Axis]: Fidelity Government Portfolio Fund Class III
Schedule of Investments [Line Items]
Total Rate		4.58%			4.58%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[7]	$ 20,397			$ 20,397
Investment, Identifier [Axis]: AAC Holdings, Inc., Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[8]				0
Ending balance	[9]	$ 0			$ 0
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		18.00%	[9]		18.00%	[9]		18.00%	[8]
PIK Rate		18.00%	[9]		18.00%	[9]		18.00%	[8]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[8]				$ 149
Ending balance	[9]	$ 171			$ 171
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		18.00%	[9]		18.00%	[9]		18.00%	[8]
PIK Rate		18.00%	[9]		18.00%	[9]		18.00%	[8]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[8]				$ 4,958
Ending balance	[9]	$ 5,687			5,687
Investment, Identifier [Axis]: AAC Holdings, Inc., Warrants
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[8],[10]				0
Ending balance	[9],[11]	0			0
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 1
Schedule of Investments [Line Items]
Spread	[12],[13],[14]							5.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[13],[14]				0
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[12],[14]							11.43%
Spread	[12],[14]							6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				1,081
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[12],[14]							11.43%
Spread	[12],[14]							6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				2,304
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate	[12],[14]							11.43%
Spread	[12],[14]							6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				772
Investment, Identifier [Axis]: ADS Tactical, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate	[8],[14]							11.22%
Spread	[8],[14]							5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[8],[14]				4,214
Investment, Identifier [Axis]: AFG Capital Group, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							1,800
Amount of Unrealized Gain/(Loss)							(2,050)
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							2,350
Gross Additions							1,800
Gross Reductions							4,150
Ending balance				0			0
Investment, Identifier [Axis]: AMEREQUIP LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[15]				100
Ending balance	[16],[17]	40			40
Investment, Identifier [Axis]: AMEREQUIP LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread	[12],[13],[14]							7.40%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[13],[14]				0
Investment, Identifier [Axis]: AMEREQUIP LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[12],[14]							12.76%
Spread	[12],[14]							7.40%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				1,538
Investment, Identifier [Axis]: ATS Operating, LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12]				90
Ending balance	[16]	$ 100			$ 100
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.59%	[16],[18]		11.59%	[16],[18]		12.16%	[12],[14]
Spread		6.00%	[16],[18]		6.00%	[16],[18]		6.50%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 50
Ending balance	[16],[18]	$ 105			$ 105
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.59%	[16],[18]		10.59%	[16],[18]		11.16%	[12],[14]
Spread		5.00%	[16],[18]		5.00%	[16],[18]		5.50%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 925
Ending balance	[16],[18]	$ 925			$ 925
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12.59%	[16],[18]		12.59%	[16],[18]		13.16%	[12],[14]
Spread		7.00%	[16],[18]		7.00%	[16],[18]		7.50%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 925
Ending balance	[16],[18]	$ 925			925
Investment, Identifier [Axis]: ATX Networks Corp., Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							3,178
Amount of Unrealized Gain/(Loss)							(3,290)
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							3,290
Gross Additions							3,178
Gross Reductions							6,468
Ending balance				$ 0			$ 0
Investment, Identifier [Axis]: ATX Networks Corp., Secured Debt
Schedule of Investments [Line Items]
Spread				7.50%			7.50%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							(102)
Amount of Interest, Fees or Dividends Credited to Income							856
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							6,368
Gross Additions							545
Gross Reductions							6,913
Ending balance				$ 0			0
Investment, Identifier [Axis]: ATX Networks Corp., Unsecured Debt
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							(276)
Amount of Interest, Fees or Dividends Credited to Income							1,135
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							2,614
Gross Additions							1,135
Gross Reductions							3,749
Ending balance				$ 0			$ 0
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[15]				124
Ending balance	[16],[17]	$ 111			$ 111
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		7.25%	[16],[18],[19]		7.25%	[16],[18],[19]		7.25%	[12],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[13],[14]				$ (5)
Ending balance	[16],[18],[19]	$ (14)			$ (14)
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.06%	[16],[18]		12.06%	[16],[18]		12.76%	[12],[14]
Spread		7.25%	[16],[18]		7.25%	[16],[18]		7.25%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 3,344
Ending balance	[16],[18]	$ 3,365			3,365
Investment, Identifier [Axis]: Acumera, Inc., Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[17]	$ 30			30
Investment, Identifier [Axis]: Acumera, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Spread	[12],[13],[14]							7.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[13],[14]				(8)
Investment, Identifier [Axis]: Acumera, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[12],[14]							12.98%
Spread	[12],[14]							7.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				11,922
Investment, Identifier [Axis]: Acumera, Inc., Warrants
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[20]				$ 90
Investment, Identifier [Axis]: Adams Publishing Group, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.00%	[16],[18],[21]		11.00%	[16],[18],[21]		11.00%	[12],[14],[22]
Spread		7.00%	[16],[18],[21]		7.00%	[16],[18],[21]		7.00%	[12],[14],[22]
PIK Rate		1.00%	[16],[18],[21]		1.00%	[16],[18],[21]		1.00%	[12],[14],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14],[22]				$ 917
Ending balance	[16],[18],[21]	$ 924			$ 924
Investment, Identifier [Axis]: Adams Publishing Group, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.00%	[16],[18],[21]		11.00%	[16],[18],[21]		11.00%	[12],[14],[22]
Spread		7.00%	[16],[18],[21]		7.00%	[16],[18],[21]		7.00%	[12],[14],[22]
PIK Rate		1.00%	[16],[18],[21]		1.00%	[16],[18],[21]		1.00%	[12],[14],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14],[22]				$ 2,481
Ending balance	[16],[18],[21]	$ 2,274			$ 2,274
Investment, Identifier [Axis]: American Health Staffing Group, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Spread		5.00%	[16],[18],[19]		5.00%	[16],[18],[19]		5.00%	[12],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[13],[14]				$ (10)
Ending balance	[16],[18],[19]	$ (7)			$ (7)
Investment, Identifier [Axis]: American Health Staffing Group, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.00%	[16],[18]		13.00%	[16],[18]		13.50%	[12],[14]
Spread		5.00%	[16],[18]		5.00%	[16],[18]		5.00%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 8,188
Ending balance	[16],[18]	$ 7,703			$ 7,703
Investment, Identifier [Axis]: American Nuts, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		15.23%	[16],[18]		15.23%	[16],[18]		15.29%	[12],[14]
Spread		9.75%	[16],[18]		9.75%	[16],[18]		9.75%	[12],[14]
PIK Rate		15.23%	[16],[18]		15.23%	[16],[18]		15.29%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 4,102
Ending balance	[16],[18]	$ 4,556			$ 4,556
Investment, Identifier [Axis]: American Nuts, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		17.20%	[16],[18],[23]		17.20%	[16],[18],[23]		15.29%	[12],[14]
Spread		11.75%	[16],[18],[23]		11.75%	[16],[18],[23]		9.75%	[12],[14]
PIK Rate		17.20%	[16],[18],[23]		17.20%	[16],[18],[23]		15.29%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 0
Ending balance	[16],[18],[23]	$ 2,851			2,851
Investment, Identifier [Axis]: American Nuts, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[12],[14],[24]							17.29%
Spread	[12],[14],[24]							11.75%
PIK Rate	[12],[14],[24]							17.29%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14],[24]				2,522
Investment, Identifier [Axis]: American Nuts, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate	[12],[14],[24]							17.29%
Spread	[12],[14],[24]							11.75%
PIK Rate	[12],[14],[24]							17.29%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14],[24]				0
Investment, Identifier [Axis]: American Teleconferencing Services, Ltd., Secured Debt 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[8],[24],[25]				109
Ending balance	[9],[23],[26]	59			59
Investment, Identifier [Axis]: American Teleconferencing Services, Ltd., Secured Debt 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[8],[24],[25]				526
Ending balance	[9],[23],[26]	282			282
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Total Rate				14.13%			14.13%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,210		0
Gross Additions							0
Gross Reductions							0
Ending balance		1,430		$ 0	1,430		0
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Preferred Member Units 1.1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					0
Gross Reductions					0
Ending balance		0			0
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Total Rate								14.13%
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							260
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0		880
Gross Additions							260
Gross Reductions							0
Ending balance		0		$ 1,140	0		$ 1,140
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Preferred Member Units 2.1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					220
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,210
Gross Additions					220
Gross Reductions					0
Ending balance		1,430			1,430
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate				15.38%			15.38%	15.38%	[14]
Spread				10.00%			10.00%	10.00%	[14]
Amount of Realized Gain/(Loss)					0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					4		2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					54	[14]	(2)
Gross Additions					0		41
Gross Reductions					54		0
Ending balance		$ 0	[19]	$ 39	$ 0	[19]	$ 39
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.75%		15.38%	13.75%		15.38%	15.38%	[14]
Spread				10.00%			10.00%	10.00%	[14]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					138		143
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,020	[14]	1,135
Gross Additions					79		16
Gross Reductions					75		118
Ending balance		$ 1,024		$ 1,033	1,024		1,033
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Warrants
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[10]	0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 0	[11]	0	$ 0	[11]	0
Investment, Identifier [Axis]: Ansira Partners II, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[16],[18]	11.88%			11.88%
Spread	[16],[18]	6.75%			6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18]	$ 148			$ 148
Investment, Identifier [Axis]: Ansira Partners II, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[16],[18]	12.08%			12.08%
Spread	[16],[18]	6.75%			6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18]	$ 17,597			$ 17,597
Investment, Identifier [Axis]: ArborWorks, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12]				0
Ending balance	[16]	0			0
Investment, Identifier [Axis]: ArborWorks, LLC, Preferred Equity 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12]				7,468
Ending balance	[16]	6,667			6,667
Investment, Identifier [Axis]: ArborWorks, LLC, Preferred Equity 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12]				0
Ending balance	[16]	$ 0			$ 0
Investment, Identifier [Axis]: ArborWorks, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		15.00%	[16]		15.00%	[16]		15.00%	[12]
PIK Rate		15.00%	[16]		15.00%	[16]		15.00%	[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12]				$ 1,007
Ending balance	[16]	$ 2,106			$ 2,106
Investment, Identifier [Axis]: ArborWorks, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.76%	[16],[18]		11.76%	[16],[18]		12.04%	[12],[14]
Spread		6.50%	[16],[18]		6.50%	[16],[18]		6.50%	[12],[14]
PIK Rate		11.76%	[16],[18]		11.76%	[16],[18]		12.04%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 3,765
Ending balance	[16],[18]	$ 4,157			4,157
Investment, Identifier [Axis]: Archer Systems, LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12]				100
Ending balance	[16]	100			100
Investment, Identifier [Axis]: BP Loenbro Holdings Inc., Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16]	$ 1,550			$ 1,550
Investment, Identifier [Axis]: BP Loenbro Holdings Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[16],[18],[27]	11.22%			11.22%
Spread	[16],[18],[27]	6.00%			6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18],[27]	$ 771			$ 771
Investment, Identifier [Axis]: BP Loenbro Holdings Inc., Secured Debt 2
Schedule of Investments [Line Items]
Spread	[16],[18],[19]	6.00%			6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18],[19]	$ (11)			$ (11)
Investment, Identifier [Axis]: BP Loenbro Holdings Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[16],[18]	11.35%			11.35%
Spread	[16],[18]	6.00%			6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18]	$ 11,288			$ 11,288
Investment, Identifier [Axis]: Barfly Ventures, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					407		(94)
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,380	[12]	1,107
Gross Additions					407		0
Gross Reductions					0		94
Ending balance		1,787	[16]	1,013	1,787	[16]	1,013
Investment, Identifier [Axis]: Batjer TopCo, LLC, Preferred Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(110)		225
Amount of Interest, Fees or Dividends Credited to Income					71		70
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					680	[15]	455
Gross Additions					0		225
Gross Reductions					110		0
Ending balance		$ 570	[17]	680	$ 570	[17]	680
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		10.00%			10.00%
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					(1)		1
Amount of Interest, Fees or Dividends Credited to Income					3		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[13]	(1)
Gross Additions					50		1
Gross Reductions					1		0
Ending balance		$ 49		$ 0	$ 49		$ 0
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.00%		10.00%	10.00%		10.00%	10.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					2		1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					30		0
Gross Additions					0		70
Gross Reductions					0		0
Ending balance		$ 30		$ 70	$ 30		$ 70
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		10.00%		10.00%	10.00%		10.00%	10.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(15)		16
Amount of Interest, Fees or Dividends Credited to Income					93		98
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,175		1,205
Gross Additions					4		20
Gross Reductions					15		50
Ending balance		$ 1,164		$ 1,175	1,164		1,175
Investment, Identifier [Axis]: Berry Aviation, Inc., Preferred Member Units 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[28]				200
Ending balance	[16]	0			0
Investment, Identifier [Axis]: Berry Aviation, Inc., Preferred Member Units 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[15],[28]				2,560
Ending balance	[16],[29]	0			0
Investment, Identifier [Axis]: Berry Aviation, Inc., Preferred Member Units 3
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[29]	$ 0			$ 0
Investment, Identifier [Axis]: Bettercloud, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Spread		10.25%	[16],[18],[19]		10.25%	[16],[18],[19]		7.25%	[12],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[13],[14]				$ (18)
Ending balance	[16],[18],[19]	$ (15)			$ (15)
Investment, Identifier [Axis]: Bettercloud, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		15.31%	[16],[18]		15.31%	[16],[18]		12.64%	[12],[14]
Spread		10.25%	[16],[18]		10.25%	[16],[18]		7.25%	[12],[14]
PIK Rate		9.25%	[16],[18]		9.25%	[16],[18]		6.25%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 7,998
Ending balance	[16],[18]	$ 7,544			7,544
Investment, Identifier [Axis]: Binswanger Enterprises, LLC, Member Units
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12]				120
Ending balance	[16]	580			580
Investment, Identifier [Axis]: Bluestem Brands, Inc., Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[8]				533
Ending balance	[9]	$ 0			$ 0
Investment, Identifier [Axis]: Bluestem Brands, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.82%	[9],[18]		13.82%	[9],[18]		16.00%	[8],[14]
Spread		8.50%	[9],[18]		8.50%	[9],[18]		7.50%	[8],[14]
PIK Rate		12.82%	[9],[18]		12.82%	[9],[18]		15.00%	[8],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[8],[14]				$ 1,907
Ending balance	[9],[18]	$ 187			$ 187
Investment, Identifier [Axis]: Bluestem Brands, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		15.50%	[9],[18]		15.50%	[9],[18]		13.96%	[8],[14]
Spread		7.50%	[9],[18]		7.50%	[9],[18]		8.50%	[8],[14]
PIK Rate		15.00%	[9],[18]		15.00%	[9],[18]		12.96%	[8],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[8],[14]				$ 3,695
Ending balance	[9],[18]	$ 3,388			$ 3,388
Investment, Identifier [Axis]: Bluestem Brands, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[9],[18]	13.82%			13.82%
Spread	[9],[18]	8.50%			8.50%
PIK Rate	[9],[18]	12.82%			12.82%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[9],[18]	$ 3,978			$ 3,978
Investment, Identifier [Axis]: Bluestem Brands, Inc., Warrants
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[8],[10]				129
Ending balance	[9],[11]	0			0
Investment, Identifier [Axis]: Boccella Precast Products LLC, Member Units
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					498
Ending balance	[17]	$ 80			$ 80
Investment, Identifier [Axis]: Boccella Precast Products LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.00%			10.00%			10.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 80
Ending balance		$ 66			66
Investment, Identifier [Axis]: Bond Brand Loyalty ULC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[30],[31]				0
Ending balance	[16],[32],[33]	0			0
Investment, Identifier [Axis]: Bond Brand Loyalty ULC, Preferred Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[30],[31]				310
Ending balance	[16],[32],[33]	$ 310			$ 310
Investment, Identifier [Axis]: Bond Brand Loyalty ULC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		7.00%	[16],[18],[19],[32],[33]		7.00%	[16],[18],[19],[32],[33]		7.00%	[12],[13],[14],[30],[31]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[13],[14],[30],[31]				$ (16)
Ending balance	[16],[18],[19],[32],[33]	$ (13)			$ (13)
Investment, Identifier [Axis]: Bond Brand Loyalty ULC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.48%	[16],[18],[32],[33]		11.48%	[16],[18],[32],[33]		11.54%	[12],[14],[30],[31]
Spread		6.00%	[16],[18],[32],[33]		6.00%	[16],[18],[32],[33]		6.00%	[12],[14],[30],[31]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14],[30],[31]				$ 4,040
Ending balance	[16],[18],[32],[33]	$ 4,010			$ 4,010
Investment, Identifier [Axis]: Bond Brand Loyalty ULC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		13.48%	[16],[18],[32],[33]		13.48%	[16],[18],[32],[33]		13.54%	[12],[14],[30],[31]
Spread		8.00%	[16],[18],[32],[33]		8.00%	[16],[18],[32],[33]		8.00%	[12],[14],[30],[31]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14],[30],[31]				$ 4,040
Ending balance	[16],[18],[32],[33]	$ 4,010			4,010
Investment, Identifier [Axis]: Brewer Crane Holdings, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(40)		(370)
Amount of Interest, Fees or Dividends Credited to Income					23		23
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,400	[15]	1,770
Gross Additions					0		0
Gross Reductions					40		370
Ending balance		$ 1,360	[17]	$ 1,400	$ 1,360	[17]	$ 1,400
Investment, Identifier [Axis]: Brewer Crane Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		15.35%	[18]	15.44%	15.35%	[18]	15.44%	15.46%	[14]
Spread		10.00%	[18]	10.00%	10.00%	[18]	10.00%	10.00%	[14]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		(29)
Amount of Interest, Fees or Dividends Credited to Income					158		169
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,374	[14]	1,491
Gross Additions					4		8
Gross Reductions					93		123
Ending balance		$ 1,285	[18]	$ 1,376	1,285	[18]	1,376
Investment, Identifier [Axis]: Brightwood Capital Fund Investments, LP Interests (Brightwood Capital Fund III, LP)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[30],[34],[35]				1,360
Ending balance	[32],[36],[37]	1,156			1,156
Investment, Identifier [Axis]: Brightwood Capital Fund Investments, LP Interests (Brightwood Capital Fund IV, LP)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[15],[30],[34],[35]				8,716
Ending balance	[17],[32],[36],[37]	$ 8,802			$ 8,802
Investment, Identifier [Axis]: Buca C, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Total Rate		6.00%			6.00%			6.00%
PIK Rate		6.00%			6.00%			6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 0
Ending balance		$ 0			0
Investment, Identifier [Axis]: Buca C, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[25]							12.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[25]				$ 8,218
Investment, Identifier [Axis]: Buca C, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[23]	15.00%			15.00%
PIK Rate	[23]	10.00%			10.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[23]	$ 10,817			$ 10,817
Investment, Identifier [Axis]: Buca C, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[19],[23]	15.00%			15.00%
PIK Rate	[19],[23]	15.00%			15.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[19],[23]	$ 0			$ 0
Investment, Identifier [Axis]: Buca C, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[23],[26]	15.00%			15.00%
PIK Rate	[23],[26]	15.00%			15.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[23],[26]	$ 0			$ 0
Investment, Identifier [Axis]: Burning Glass Intermediate Holding Company, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[12],[14]							10.46%
Spread		5.00%	[16],[18],[19]		5.00%	[16],[18],[19]		5.00%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 310
Ending balance	[16],[18],[19]	$ 0			$ 0
Investment, Identifier [Axis]: Burning Glass Intermediate Holding Company, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		9.95%	[16],[18]		9.95%	[16],[18]		10.46%	[12],[14]
Spread		5.00%	[16],[18]		5.00%	[16],[18]		5.00%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 13,121
Ending balance	[16],[18]	$ 12,125			12,125
Investment, Identifier [Axis]: CAI Software LLC, Preferred Equity 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					379
Ending balance		472			472
Investment, Identifier [Axis]: CAI Software LLC, Preferred Equity 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Ending balance		$ 0			$ 0
Investment, Identifier [Axis]: CQ Fluency, LLC, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread	[16],[18],[19]	6.75%			6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18],[19]	$ (35)			$ (35)
Investment, Identifier [Axis]: CQ Fluency, LLC, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Spread	[16],[18],[19]	6.75%			6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18],[19]	$ (35)			$ (35)
Investment, Identifier [Axis]: CQ Fluency, LLC, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[16],[18]	11.49%			11.49%
Spread	[16],[18]	6.75%			6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18]	$ 7,170			$ 7,170
Investment, Identifier [Axis]: CQ Fluency, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread	[12],[13],[14]							7.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[13],[14]				(44)
Investment, Identifier [Axis]: CQ Fluency, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Spread	[12],[13],[14]							7.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[13],[14]				(44)
Investment, Identifier [Axis]: CQ Fluency, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[12],[14]							12.45%
Spread	[12],[14]							7.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				7,280
Investment, Identifier [Axis]: Career Team Holdings, LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					500
Ending balance		$ 500			$ 500
Investment, Identifier [Axis]: Career Team Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.25%	[18]		11.25%	[18]		11.38%	[14]
Spread		6.00%	[18]		6.00%	[18]		6.00%	[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				$ 96
Ending balance	[18]	$ 71			$ 71
Investment, Identifier [Axis]: Career Team Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.00%			13.00%			13.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 2,185
Ending balance		$ 2,176			2,176
Investment, Identifier [Axis]: CaseWorthy, Inc., Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12]				80
Ending balance	[16]	160			160
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Spread	[12],[13],[14]							6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[13],[14]				(3)
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[12],[14]							11.61%
Spread	[12],[14]							6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				2,581
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[12],[14]							11.61%
Spread	[12],[14]							6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				1,985
Investment, Identifier [Axis]: CenterPeak Holdings, LLC, Preferred Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[17]	1,590			1,590
Investment, Identifier [Axis]: CenterPeak Holdings, LLC, Secured Debt 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[19]	$ 0			$ 0
Investment, Identifier [Axis]: CenterPeak Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		15.00%			15.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 2,390			$ 2,390
Investment, Identifier [Axis]: Central Moloney, LLC., Secured Debt
Schedule of Investments [Line Items]
Total Rate	[16],[18]	11.35%			11.35%
Spread	[16],[18]	6.75%			6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18]	$ 12,773			$ 12,773
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					230		430
Amount of Interest, Fees or Dividends Credited to Income					23		23
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,760		2,170
Gross Additions					230		430
Gross Reductions					0		0
Ending balance		$ 2,990		$ 2,600	$ 2,990		$ 2,600
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		10.00%	[18],[19]	9.00%	10.00%	[18],[19]	9.00%	9.00%	[13],[14]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					2		2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[13],[14]	0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 0	[18],[19]	$ 0	$ 0	[18],[19]	$ 0
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		15.35%	[18]	14.48%	15.35%	[18]	14.48%	14.48%	[14]
Spread		10.00%	[18]	9.00%	10.00%	[18]	9.00%	9.00%	[14]
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							33
Amount of Interest, Fees or Dividends Credited to Income							406
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 4,394	[14]	3,731
Gross Additions							663
Gross Reductions							0
Ending balance		$ 5,116	[18]	$ 4,394	$ 5,116	[18]	4,394
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt 2.1
Schedule of Investments [Line Items]
Total Rate		15.35%			15.35%
Spread		10.00%			10.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					54
Amount of Interest, Fees or Dividends Credited to Income					550
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					5,494
Gross Reductions					378
Ending balance		$ 5,116			5,116
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					(29)
Amount of Interest, Fees or Dividends Credited to Income					84
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					4,394
Gross Additions					0
Gross Reductions					4,394
Ending balance		0			0
Investment, Identifier [Axis]: Chamberlin Holding LLC, Member Units 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					300		750
Amount of Interest, Fees or Dividends Credited to Income					969		698
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					7,330	[15]	5,728
Gross Additions					300		752
Gross Reductions					0		0
Ending balance		7,630	[17]	6,480	7,630	[17]	6,480
Investment, Identifier [Axis]: Chamberlin Holding LLC, Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					90		65
Amount of Interest, Fees or Dividends Credited to Income					17		17
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					715	[15],[28]	678
Gross Additions					90		65
Gross Reductions					0		0
Ending balance		$ 805	[17],[29]	$ 743	$ 805	[17],[29]	$ 743
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6.00%	[18],[19]	6.00%	6.00%	[18],[19]	6.00%	6.00%	[13],[14]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(17)		35
Amount of Interest, Fees or Dividends Credited to Income					18		5
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[13],[14]	0
Gross Additions					17		0
Gross Reductions					17		0
Ending balance		$ 0	[18],[19]	$ 0	$ 0	[18],[19]	$ 0
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.36%	[18]	13.49%	13.36%	[18]	13.49%	13.49%	[14]
Spread		8.00%	[18]	8.00%	8.00%	[18]	8.00%	8.00%	[14]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(1)		(4)
Amount of Interest, Fees or Dividends Credited to Income					401		416
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,905	[14]	4,236
Gross Additions					1		4
Gross Reductions					1		138
Ending balance		$ 3,905	[18]	$ 4,102	$ 3,905	[18]	4,102
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.02%	[16],[18],[27]		12.02%	[16],[18],[27]		12.60%	[12],[14],[38]
Spread		7.00%	[16],[18],[27]		7.00%	[16],[18],[27]		7.00%	[12],[14],[38]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14],[38]				$ 183
Ending balance	[16],[18],[27]	$ 437			$ 437
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.55%	[16],[18]		12.55%	[16],[18]		12.66%	[12],[14]
Spread		7.00%	[16],[18]		7.00%	[16],[18]		7.00%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 3,224
Ending balance	[16],[18]	$ 3,125			$ 3,125
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12.55%	[16],[18]		12.55%	[16],[18]		12.66%	[12],[14]
Spread		7.00%	[16],[18]		7.00%	[16],[18]		7.00%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 179
Ending balance	[16],[18]	$ 173			$ 173
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate		12.55%	[16],[18]		12.55%	[16],[18]		12.66%	[12],[14]
Spread		7.00%	[16],[18]		7.00%	[16],[18]		7.00%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 432
Ending balance	[16],[18]	$ 418			418
Investment, Identifier [Axis]: Charps, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(20)		170
Amount of Interest, Fees or Dividends Credited to Income					121		167
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,920	[15]	3,330
Gross Additions					0		170
Gross Reductions					20		0
Ending balance		3,900	[17]	3,500	3,900	[17]	3,500
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Member Units 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					910		(660)
Amount of Interest, Fees or Dividends Credited to Income					146		69
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,300	[15]	2,060
Gross Additions					910		0
Gross Reductions					0		660
Ending balance		2,210	[17]	1,400	2,210	[17]	1,400
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(45)		55
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					282	[28]	152
Gross Additions					0		130
Gross Reductions					45		0
Ending balance		237	[29]	282	237	[29]	282
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate								11.50%
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,103		0
Gross Additions							0
Gross Reductions							0
Ending balance		0	[19]	$ 0	0	[19]	$ 0
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 1.1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					0
Gross Reductions					0
Ending balance		$ 0			$ 0
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.00%		11.50%	10.00%		11.50%	10.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							(37)
Amount of Interest, Fees or Dividends Credited to Income							220
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 251		2,620
Gross Additions							0
Gross Reductions							457
Ending balance		$ 1,783		$ 2,163	$ 1,783		$ 2,163
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 2.1
Schedule of Investments [Line Items]
Total Rate		10.00%			10.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					37
Amount of Interest, Fees or Dividends Credited to Income					176
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,103
Gross Additions					30
Gross Reductions					350
Ending balance		$ 1,783			$ 1,783
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		10.00%		10.00%	10.00%		10.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					19		20
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					251		260
Gross Additions					0		0
Gross Reductions					7		7
Ending balance		$ 244		$ 253	244		253
Investment, Identifier [Axis]: Clarius BIGS, LLC, Secured Debt
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[24],[25]				16
Ending balance	[16],[23],[26]	17			17
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Preferred Member Units
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[15]				4,000
Ending balance	[17]	660			660
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[14]							11.69%
Spread	[14]							6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				1,140
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate								8.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					4,819
Investment, Identifier [Axis]: Cody Pools, Inc., Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(630)		2,740
Amount of Interest, Fees or Dividends Credited to Income					392		653
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					18,120	[15],[28]	14,550
Gross Additions					0		2,740
Gross Reductions					630		0
Ending balance		17,490	[17],[29]	17,290	17,490	[17],[29]	17,290
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					1		2
Amount of Interest, Fees or Dividends Credited to Income					6		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[13]	0
Gross Additions					236		0
Gross Reductions					236		0
Ending balance		$ 0	[19]	$ 0	$ 0	[19]	$ 0
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.50%		12.50%	12.50%		12.50%	12.50%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(6)		25
Amount of Interest, Fees or Dividends Credited to Income					660		330
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					7,111		0
Gross Additions					5		7,872
Gross Reductions					404		495
Ending balance		$ 6,712		$ 7,377	6,712		$ 7,377
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Spread				10.50%			10.50%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							(11)
Amount of Interest, Fees or Dividends Credited to Income							26
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							273
Gross Additions							14
Gross Reductions							287
Ending balance				$ 0			$ 0
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 4
Schedule of Investments [Line Items]
Spread				10.50%			10.50%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							(96)
Amount of Interest, Fees or Dividends Credited to Income							500
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							6,882
Gross Additions							0
Gross Reductions							6,882
Ending balance				$ 0			0
Investment, Identifier [Axis]: Colonial Electric Company LLC, Preferred Member Units
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[17]	3,280			3,280
Investment, Identifier [Axis]: Colonial Electric Company LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(360)		360
Amount of Interest, Fees or Dividends Credited to Income					360		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					600		0
Gross Additions					0		600
Gross Reductions					600		0
Ending balance		0		600	0		600
Investment, Identifier [Axis]: Colonial Electric Company LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					1,360		(370)
Amount of Interest, Fees or Dividends Credited to Income					560		(295)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,920		2,290
Gross Additions					1,360		0
Gross Reductions					0		370
Ending balance		3,280		1,920	3,280		1,920
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					2		12
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[13]	0
Gross Additions					0		400
Gross Reductions					0		400
Ending balance		$ 0	[19]	$ 0	$ 0	[19]	$ 0
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.00%		12.00%	12.00%		12.00%	12.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					73		(77)
Amount of Interest, Fees or Dividends Credited to Income					469		542
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					5,407		5,729
Gross Additions					105		26
Gross Reductions					1,456		313
Ending balance		$ 4,056		$ 5,442	4,056		5,442
Investment, Identifier [Axis]: Compass Systems & Sales, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					117
Amount of Interest, Fees or Dividends Credited to Income					45
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,863
Gross Additions					117
Gross Reductions					0
Ending balance		1,980			1,980
Investment, Identifier [Axis]: Compass Systems & Sales, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					18
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[13]				0
Gross Additions					583
Gross Reductions					600
Ending balance	[19]	$ (17)			$ (17)
Investment, Identifier [Axis]: Compass Systems & Sales, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.50%			13.50%			13.50%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					461
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					4,175
Gross Additions					19
Gross Reductions					0
Ending balance		$ 4,194			$ 4,194
Investment, Identifier [Axis]: Computer Data Source, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.29%	[16],[18],[27]		13.29%	[16],[18],[27]		13.52%	[12],[14],[39]
Spread		8.00%	[16],[18],[27]		8.00%	[16],[18],[27]		8.00%	[12],[14],[39]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14],[39]				$ 4,040
Ending balance	[16],[18],[27]	$ 6,117			$ 6,117
Investment, Identifier [Axis]: Computer Data Source, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[12],[14]							13.52%
Spread		8.00%	[16],[18],[19]		8.00%	[16],[18],[19]		8.00%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 14,797
Ending balance	[16],[18],[19]	$ (49)			$ (49)
Investment, Identifier [Axis]: Computer Data Source, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[16],[18]	13.28%			13.28%
Spread	[16],[18]	8.00%			8.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18]	$ 14,823			$ 14,823
Investment, Identifier [Axis]: Construction Supply Investments, LLC, Member Units
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12]				23,135
Ending balance	[16]	0			0
Investment, Identifier [Axis]: Copper Trail Fund Investments, LP Interests (CTMH, LP)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		38
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					568	[15],[30],[34],[35]	588
Gross Additions					0		0
Gross Reductions					38		0
Ending balance		$ 530	[32],[36],[37]	588	$ 530	[32],[36],[37]	588
Investment, Identifier [Axis]: Coregistics Buyer LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread	[16],[18],[32],[33]	6.50%			6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18],[32],[33]	$ 429			$ 429
Investment, Identifier [Axis]: Coregistics Buyer LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[16],[18],[32],[33]	11.45%			11.45%
Spread	[16],[18],[32],[33]	6.50%			6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18],[32],[33]	$ 2,752			$ 2,752
Investment, Identifier [Axis]: Coregistics Buyer LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[16],[18],[32],[33]	11.62%			11.62%
Spread	[16],[18],[32],[33]	6.50%			6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18],[32],[33]	$ 1,835			$ 1,835
Investment, Identifier [Axis]: Coregistics Buyer LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate	[16],[18],[32],[33]	11.70%			11.70%
Spread	[16],[18],[32],[33]	6.75%			6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18],[32],[33]	$ 8,448			$ 8,448
Investment, Identifier [Axis]: Creative Foam Corporation, Secured Debt 1
Schedule of Investments [Line Items]
Spread	[16],[18],[19]	5.75%			5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18],[19]	$ (29)			$ (29)
Investment, Identifier [Axis]: Creative Foam Corporation, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[16],[18]	10.35%			10.35%
Spread	[16],[18]	5.75%			5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18]	$ 10,733			$ 10,733
Investment, Identifier [Axis]: DMA Industries, LLC, Preferred Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,920
Investment, Identifier [Axis]: DMA Industries, LLC, Preferred Equity 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 1,486			$ 1,486
Investment, Identifier [Axis]: DMA Industries, LLC, Preferred Equity 2
Schedule of Investments [Line Items]
Total Rate	[17]	15.00%			15.00%
PIK Rate	[17]	15.00%			15.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[17]	$ 781			$ 781
Investment, Identifier [Axis]: DMA Industries, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate								12.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 4,700
Investment, Identifier [Axis]: DMA Industries, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 137			$ 137
Investment, Identifier [Axis]: DMA Industries, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 4,159			$ 4,159
Investment, Identifier [Axis]: DTE Enterprises, LLC, Class A Preferred Member Units
Schedule of Investments [Line Items]
Total Rate		8.00%	[16]		8.00%	[16]		8.00%	[12]
PIK Rate		8.00%	[16]		8.00%	[16]		8.00%	[12]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12]				$ 260
Ending balance	[16]	$ 0			$ 0
Investment, Identifier [Axis]: DTE Enterprises, LLC, Class AA Preferred Member Units (non-voting)
Schedule of Investments [Line Items]
Total Rate		10.00%	[16],[17]		10.00%	[16],[17]		10.00%	[12],[15]
PIK Rate		10.00%	[16],[17]		10.00%	[16],[17]		10.00%	[12],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[15]				$ 1,283
Ending balance	[16],[17]	$ 681			681
Investment, Identifier [Axis]: Dalton US Inc., Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12]				60
Ending balance	[16]	60			60
Investment, Identifier [Axis]: Datacom, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					30		(270)
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					10		300
Gross Additions					30		0
Gross Reductions					0		270
Ending balance		$ 40		$ 30	$ 40		$ 30
Investment, Identifier [Axis]: Datacom, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		7.50%		7.50%	7.50%		7.50%	7.50%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					3		3
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					49		25
Gross Additions					50		89
Gross Reductions					60		55
Ending balance		$ 39		$ 59	$ 39		$ 59
Investment, Identifier [Axis]: Datacom, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.00%		10.00%	10.00%		10.00%	10.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					7		(14)
Amount of Interest, Fees or Dividends Credited to Income					86		89
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					844		865
Gross Additions					24		17
Gross Reductions					23		36
Ending balance		$ 845		$ 846	845		846
Investment, Identifier [Axis]: Digital Products Holdings LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					38		38
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,459	[15]	2,459
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 2,459	[17]	$ 2,459	$ 2,459	[17]	$ 2,459
Investment, Identifier [Axis]: Digital Products Holdings LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		15.25%	[18]	15.38%	15.25%	[18]	15.38%	15.38%	[14]
Spread		10.00%	[18]	10.00%	10.00%	[18]	10.00%	10.00%	[14]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		(17)
Amount of Interest, Fees or Dividends Credited to Income					410		436
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,673	[14]	3,878
Gross Additions					12		0
Gross Reductions					482		209
Ending balance		$ 3,203	[18]	$ 3,669	3,203	[18]	3,669
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Preferred Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(360)		(220)
Amount of Interest, Fees or Dividends Credited to Income					0		43
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					5,180	[15]	5,558
Gross Additions					0		0
Gross Reductions					360		218
Ending balance		4,820		$ 5,340	4,820		$ 5,340
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate				14.00%			14.00%	14.00%
Amount of Realized Gain/(Loss)					0		$ 0
Amount of Unrealized Gain/(Loss)					(1)		(1)
Amount of Interest, Fees or Dividends Credited to Income					10		4
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					217		0
Gross Additions					301		226
Gross Reductions					518		1
Ending balance		$ 0	[19]	$ 225	$ 0	[19]	$ 225
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.00%		14.00%	14.00%		14.00%	14.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(11)		(15)
Amount of Interest, Fees or Dividends Credited to Income					529		550
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					5,002		5,352
Gross Additions					11		15
Gross Reductions					262		282
Ending balance		$ 4,751		$ 5,085	4,751		5,085
Investment, Identifier [Axis]: Dynamic Communities, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12]				0
Ending balance	[16]	0			0
Investment, Identifier [Axis]: Dynamic Communities, LLC, Preferred Equity 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12]				60
Ending balance	[16]	60			60
Investment, Identifier [Axis]: Dynamic Communities, LLC, Preferred Equity 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12]				0
Ending balance	[16]	$ 0			$ 0
Investment, Identifier [Axis]: Dynamic Communities, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.45%	[16],[18]		11.45%	[16],[18]		10.45%	[12],[14]
Spread		6.50%	[16],[18]		6.50%	[16],[18]		5.00%	[12],[14]
PIK Rate		11.45%	[16],[18]		11.45%	[16],[18]		10.45%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 1,912
Ending balance	[16],[18]	$ 2,155			$ 2,155
Investment, Identifier [Axis]: Dynamic Communities, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.45%	[16],[18]		13.45%	[16],[18]		12.45%	[12],[14]
Spread		8.50%	[16],[18]		8.50%	[16],[18]		7.00%	[12],[14]
PIK Rate		13.45%	[16],[18]		13.45%	[16],[18]		12.45%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 1,859
Ending balance	[16],[18]	$ 2,139			2,139
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Common Stock 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					390
Ending balance		370			370
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Common Stock 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[28]				109
Ending balance	[29]	$ 196			$ 196
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6.00%	[18],[19]		6.00%	[18],[19]		6.00%	[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[13],[14]				$ 0
Ending balance	[18],[19]	$ 0			$ 0
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%			12.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 1,200
Ending balance		$ 1,160			$ 1,160
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		9.00%			9.00%			9.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 409
Ending balance		$ 406			$ 406
Investment, Identifier [Axis]: Emerald Technologies Acquisition Co, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate		11.20%	[9],[18]		11.20%	[9],[18]		11.79%	[8],[14]
Spread		6.25%	[9],[18]		6.25%	[9],[18]		6.25%	[8],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[8],[14]				$ 2,175
Ending balance	[9],[18]	$ 1,935			1,935
Investment, Identifier [Axis]: Engineering Research & Consulting, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread	[12],[13],[14]							5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[13],[14]				0
Investment, Identifier [Axis]: Engineering Research & Consulting, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[12],[14]							11.98%
Spread	[12],[14]							6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				5,095
Investment, Identifier [Axis]: Escalent, Inc., Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12]				190
Ending balance	[16]	$ 240			$ 240
Investment, Identifier [Axis]: Escalent, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Spread		8.00%	[16],[18],[19]		8.00%	[16],[18],[19]		8.00%	[12],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[13],[14]				$ (9)
Ending balance	[16],[18],[19]	$ (8)			$ (8)
Investment, Identifier [Axis]: Escalent, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.70%	[16],[18]		12.70%	[16],[18]		13.45%	[12],[14]
Spread		8.00%	[16],[18]		8.00%	[16],[18]		8.00%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 6,924
Ending balance	[16],[18]	$ 6,872			$ 6,872
Investment, Identifier [Axis]: Event Holdco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.87%	[16],[18]		12.87%	[16],[18]		12.61%	[12],[14]
Spread		8.00%	[16],[18]		8.00%	[16],[18]		7.00%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 302
Ending balance	[16],[18]	$ 308			$ 308
Investment, Identifier [Axis]: Event Holdco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.87%	[16],[18]		12.87%	[16],[18]		12.61%	[12],[14]
Spread		8.00%	[16],[18]		8.00%	[16],[18]		7.00%	[12],[14]
PIK Rate	[16],[18]	8.00%			8.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 3,614
Ending balance	[16],[18]	$ 3,909			$ 3,909
Investment, Identifier [Axis]: FCC Intermediate Holdco, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.00%			13.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 7,074			$ 7,074
Investment, Identifier [Axis]: FCC Intermediate Holdco, LLC, Warrants
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11]	$ 980			980
Investment, Identifier [Axis]: Fidelity Government Portfolio Class III Fund
Schedule of Investments [Line Items]
Total Rate								5.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[40]				$ 3,188
Investment, Identifier [Axis]: First American Treasury Obligations Fund Class Z
Schedule of Investments [Line Items]
Total Rate		4.97%			4.97%			5.23%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[41]				$ 17,656
Ending balance	[42]	$ 10,798			10,798
Investment, Identifier [Axis]: Flame King Holdings, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					1,970		2,570
Amount of Interest, Fees or Dividends Credited to Income					808		619
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					6,970	[15]	4,400
Gross Additions					1,970		2,570
Gross Reductions					0		0
Ending balance		8,940	[17]	$ 6,970	8,940	[17]	$ 6,970
Investment, Identifier [Axis]: Flame King Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread				6.50%			6.50%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							(15)
Amount of Interest, Fees or Dividends Credited to Income							121
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							1,900
Gross Additions							15
Gross Reductions							1,915
Ending balance				$ 0			$ 0
Investment, Identifier [Axis]: Flame King Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Spread				9.00%			9.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							(123)
Amount of Interest, Fees or Dividends Credited to Income							478
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							5,300
Gross Additions							123
Gross Reductions							5,423
Ending balance				$ 0			0
Investment, Identifier [Axis]: Freeport Financial Funds, LP Interests (Freeport First Lien Loan Fund III LP)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					193		0
Amount of Interest, Fees or Dividends Credited to Income					38		446
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,705	[15],[30],[34],[35]	5,848
Gross Additions					193		0
Gross Reductions					2,005		975
Ending balance		1,893	[17],[32],[36],[37]	4,873	1,893	[17],[32],[36],[37]	4,873
Investment, Identifier [Axis]: GFG Group, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(230)		810
Amount of Interest, Fees or Dividends Credited to Income					323		82
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,870	[15]	1,790
Gross Additions					0		810
Gross Reductions					230		0
Ending balance		$ 2,640	[17]	$ 2,600	$ 2,640	[17]	$ 2,600
Investment, Identifier [Axis]: GFG Group, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		8.00%		8.00%	8.00%		8.00%	8.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(14)		(16)
Amount of Interest, Fees or Dividends Credited to Income					153		201
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,336		2,836
Gross Additions					14		16
Gross Reductions					304		216
Ending balance		$ 2,046		$ 2,636	2,046		2,636
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					93		62
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					21,890		21,890
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 21,890	[17]	$ 21,890	$ 21,890	[17]	$ 21,890
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.35%		11.48%	11.35%		11.48%	11.48%
Spread		6.00%		6.00%	6.00%		6.00%	6.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					4		0
Amount of Interest, Fees or Dividends Credited to Income					123		59
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,182		330
Gross Additions					368		508
Gross Reductions					0		0
Ending balance		$ 1,550		$ 838	$ 1,550		$ 838
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.35%		13.48%	13.35%		13.48%	13.48%
Spread		8.00%		8.00%	8.00%		8.00%	8.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(37)		(37)
Amount of Interest, Fees or Dividends Credited to Income					2,080		1,998
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					19,944		19,943
Gross Additions					37		38
Gross Reductions					37		37
Ending balance		$ 19,944		$ 19,944	19,944		19,944
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					2,660		7,680
Amount of Interest, Fees or Dividends Credited to Income					1,352		1,240
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					24,180	[15]	12,720
Gross Additions					2,660		7,680
Gross Reductions					0		0
Ending balance		$ 26,840	[17]	$ 20,400	$ 26,840	[17]	$ 20,400
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		7.00%	[18],[19],[21]	7.50%	7.00%	[18],[19],[21]	7.50%	7.50%	[13],[14],[22]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					1		1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[13],[14],[22]	0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 0	[18],[19],[21]	$ 0	$ 0	[18],[19],[21]	$ 0
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.00%	[18],[21]	10.50%	10.00%	[18],[21]	10.50%	10.50%	[14],[22]
Spread		7.00%	[18],[21]	7.50%	7.00%	[18],[21]	7.50%	7.50%	[14],[22]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(50)		(68)
Amount of Interest, Fees or Dividends Credited to Income					1,036		1,338
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					13,520	[14],[22]	16,020
Gross Additions					50		68
Gross Reductions					1,450		1,968
Ending balance		$ 12,120	[18],[21]	$ 14,120	12,120	[18],[21]	14,120
Investment, Identifier [Axis]: Garyline, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12]				210
Ending balance	[16]	$ 170			$ 170
Investment, Identifier [Axis]: Garyline, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[16],[18],[27]	11.95%			11.95%
Spread		6.75%	[16],[18],[27]		6.75%	[16],[18],[27]		6.75%	[12],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[13],[14]				$ (76)
Ending balance	[16],[18],[27]	$ 1,755			$ 1,755
Investment, Identifier [Axis]: Garyline, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.95%	[16],[18]		11.95%	[16],[18]		12.22%	[12],[14]
Spread		6.75%	[16],[18]		6.75%	[16],[18]		6.75%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 9,384
Ending balance	[16],[18]	$ 9,448			$ 9,448
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		9.50%			9.50%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					0
Gross Reductions					0
Ending balance		$ 0			$ 0
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.50%			12.50%
PIK Rate		12.50%			12.50%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(220)
Amount of Interest, Fees or Dividends Credited to Income					19
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					571
Gross Additions					0
Gross Reductions					220
Ending balance		$ 351			351
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0		0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		0		0	0		0
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(620)		(250)
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					620		950
Gross Additions					0		0
Gross Reductions					620		250
Ending balance		$ 0		$ 700	$ 0		$ 700
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		9.50%	[18],[19],[23]	9.50%	9.50%	[18],[19],[23]	9.50%	9.50%	[13],[14]
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 0	[13],[14]	0
Gross Additions							0
Gross Reductions							0
Ending balance		$ 0	[18],[19],[23]	$ 0	$ 0	[18],[19],[23]	$ 0
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.50%	[23]	12.50%	12.50%	[23]	12.50%	12.50%
PIK Rate	[23]	12.50%			12.50%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							57
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 571		571
Gross Additions							0
Gross Reductions							0
Ending balance		$ 351	[23]	$ 571	351	[23]	571
Investment, Identifier [Axis]: HDC/HW Intermediate Holdings, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16]	$ 0			$ 0
Investment, Identifier [Axis]: HDC/HW Intermediate Holdings, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		8.75%	[16],[18]		8.75%	[16],[18]		14.34%	[12],[14],[25]
Spread		3.50%	[16],[18]		3.50%	[16],[18]		9.50%	[12],[14],[25]
PIK Rate		2.50%	[16],[18]		2.50%	[16],[18]		14.34%	[12],[14],[25]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14],[25]				$ 186
Ending balance	[16],[18]	$ 1,289			$ 1,289
Investment, Identifier [Axis]: HDC/HW Intermediate Holdings, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		2.50%	[16],[23]		2.50%	[16],[23]		14.34%	[12],[14],[25]
Spread	[12],[14],[25]							9.50%
PIK Rate		2.50%	[16],[23]		2.50%	[16],[23]		14.34%	[12],[14],[25]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14],[25]				$ 1,849
Ending balance	[16],[23]	$ 359			$ 359
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 3
Schedule of Investments [Line Items]
Spread	[16],[18],[19]	6.50%			6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18],[19]	$ (18)			$ (18)
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 5
Schedule of Investments [Line Items]
Total Rate	[16],[18]	11.35%			11.35%
Spread	[16],[18]	6.50%			6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18]	$ 2,388			$ 2,388
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6.50%	[16],[18],[19]		6.50%	[16],[18],[19]		6.50%	[12],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[13],[14]				$ (14)
Ending balance	[16],[18],[19]	$ (11)			$ (11)
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.35%	[16],[18]		11.35%	[16],[18]		11.86%	[12],[14]
Spread		6.50%	[16],[18]		6.50%	[16],[18]		6.50%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 1,995
Ending balance	[16],[18]	$ 1,980			1,980
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[12],[14]							11.86%
Spread	[12],[14]							6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 4,925
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate	[16],[18]	11.35%			11.35%
Spread	[16],[18]	6.50%			6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18]	$ 4,887			$ 4,887
Investment, Identifier [Axis]: HPEP 3, L.P., LP Interests (HPEP 3, L.P.)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					247		283
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					4,225		4,331
Gross Additions					247		283
Gross Reductions					0		508
Ending balance		4,472		4,106	4,472		4,106
Investment, Identifier [Axis]: Harris Preston Fund Investments, LP Interests (2717 MH, L.P.)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					57		2,223
Amount of Unrealized Gain/(Loss)					2,769		(1,106)
Amount of Interest, Fees or Dividends Credited to Income					278		141
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					6,050	[15],[30],[34],[35]	7,552
Gross Additions					2,826		2,796
Gross Reductions					57		4,452
Ending balance		8,819	[17],[32],[36],[37]	5,896	8,819	[17],[32],[36],[37]	5,896
Investment, Identifier [Axis]: Harris Preston Fund Investments, LP Interests (HPEP 3, L.P.)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[30],[34],[35]				4,225
Ending balance	[17],[32],[36],[37]	4,472			4,472
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Preferred Member Units 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					4,370
Ending balance	[17]	4,750			4,750
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Preferred Member Units 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[28]				230
Ending balance	[29]	$ 250			$ 250
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.35%	[18]		11.35%	[18]		11.65%	[14]
Spread		6.00%	[18]		6.00%	[18]		6.00%	[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				$ 494
Ending balance	[18]	$ 640			$ 640
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.50%			12.50%			12.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 9,744
Ending balance		$ 9,744			$ 9,744
Investment, Identifier [Axis]: Hornblower Sub, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread	[16],[18],[19]	5.50%			5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18],[19]	$ (24)			$ (24)
Investment, Identifier [Axis]: Hornblower Sub, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[16],[18]	10.82%			10.82%
Spread	[16],[18]	5.50%			5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18]	$ 15,368			$ 15,368
Investment, Identifier [Axis]: Hybrid Promotions, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.84%	[16],[18]		13.84%	[16],[18]		15.91%	[12],[14]
Spread		8.25%	[16],[18]		8.25%	[16],[18]		8.25%	[12],[14]
PIK Rate	[12],[14]							2.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 7,313
Ending balance	[16],[18]	$ 8,000			8,000
Investment, Identifier [Axis]: IG Investor, LLC, Common Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					120		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,600		0
Gross Additions					120		3,774
Gross Reductions					0		174
Ending balance		$ 3,720		3,600	$ 3,720		3,600
Investment, Identifier [Axis]: IG Investor, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.00%			13.00%
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					17		3
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					(27)	[13]	0
Gross Additions					405		172
Gross Reductions					0		200
Ending balance		$ 378		$ (28)	$ 378		$ (28)
Investment, Identifier [Axis]: IG Investor, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.00%		13.00%	13.00%		13.00%	13.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					948		366
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					9,069		0
Gross Additions					48		9,162
Gross Reductions					330		0
Ending balance		$ 8,787		$ 9,162	$ 8,787		9,162
Investment, Identifier [Axis]: IG Parent Corporation, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[9],[18]	10.95%			10.95%
Spread		5.75%	[9],[18]		5.75%	[9],[18]		5.75%	[8],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[8],[13],[14]				$ 0
Ending balance	[9],[18]	$ 306			$ 306
Investment, Identifier [Axis]: IG Parent Corporation, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.70%	[9],[18]		10.70%	[9],[18]		10.96%	[8],[14]
Spread		5.75%	[9],[18]		5.75%	[9],[18]		5.50%	[8],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[8],[14]				$ 6,266
Ending balance	[9],[18]	$ 6,154			$ 6,154
Investment, Identifier [Axis]: IG Parent Corporation, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		10.70%	[9],[18]		10.70%	[9],[18]		10.96%	[8],[14]
Spread		5.75%	[9],[18]		5.75%	[9],[18]		5.50%	[8],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[8],[14]				$ 1,942
Ending balance	[9],[18]	$ 1,927			$ 1,927
Investment, Identifier [Axis]: INW Manufacturing, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.62%	[9],[18]		10.62%	[9],[18]		11.36%	[8],[14]
Spread		5.75%	[9],[18]		5.75%	[9],[18]		5.75%	[8],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[8],[14]				$ 5,325
Ending balance	[9],[18]	$ 5,355			$ 5,355
Investment, Identifier [Axis]: ITA Holdings Group, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		15.53%	[18]		15.53%	[18]		16.59%	[14]
Spread		9.00%	[18]		9.00%	[18]		9.00%	[14]
PIK Rate		1.00%	[18]		1.00%	[18]		2.00%	[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				$ 201
Ending balance	[18]	$ 294			$ 294
Investment, Identifier [Axis]: ITA Holdings Group, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		15.53%	[18]		15.53%	[18]		16.59%	[14]
Spread		9.00%	[18]		9.00%	[18]		9.00%	[14]
PIK Rate		1.00%	[18]		1.00%	[18]		2.00%	[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				$ 174
Ending balance	[18]	$ 248			$ 248
Investment, Identifier [Axis]: ITA Holdings Group, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		14.53%	[18]		14.53%	[18]		15.59%	[14]
Spread		8.00%	[18]		8.00%	[18]		8.00%	[14]
PIK Rate		1.00%	[18]		1.00%	[18]		2.00%	[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				$ 842
Ending balance	[18]	$ 915			$ 915
Investment, Identifier [Axis]: ITA Holdings Group, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate		16.53%	[18]		16.53%	[18]		17.59%	[14]
Spread		10.00%	[18]		10.00%	[18]		10.00%	[14]
PIK Rate		1.00%	[18]		1.00%	[18]		2.00%	[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				$ 848
Ending balance	[18]	$ 915			915
Investment, Identifier [Axis]: ITA Holdings Group, LLC, Warrants
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[10]				523
Ending balance	[11]	820			820
Investment, Identifier [Axis]: Imaging Business Machines, L.L.C., Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12]				550
Ending balance	[16]	$ 540			$ 540
Investment, Identifier [Axis]: Imaging Business Machines, L.L.C., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.08%	[16],[18],[27]		12.08%	[16],[18],[27]		12.41%	[12],[14],[43]
Spread		7.00%	[16],[18],[27]		7.00%	[16],[18],[27]		7.00%	[12],[14],[43]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14],[43]				$ 786
Ending balance	[16],[18],[27]	$ 593			$ 593
Investment, Identifier [Axis]: Imaging Business Machines, L.L.C., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.62%	[16],[18]		11.62%	[16],[18]		12.45%	[12],[14]
Spread		7.00%	[16],[18]		7.00%	[16],[18]		7.00%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 10,318
Ending balance	[16],[18]	$ 10,306			$ 10,306
Investment, Identifier [Axis]: Implus Footcare, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		14.01%	[16],[18]		14.01%	[16],[18]		14.25%	[12],[14]
Spread		9.25%	[16],[18]		9.25%	[16],[18]		7.75%	[12],[14]
PIK Rate		1.50%	[16],[18]		1.50%	[16],[18]		1.00%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 15,816
Ending balance	[16],[18]	$ 15,988			15,988
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Common Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					970		(280)
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					6,320	[12]	0
Gross Additions					970		6,540
Gross Reductions					0		280
Ending balance		7,290	[16]	6,260	7,290	[16]	6,260
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Member Units
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[28]				1,610
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Total Rate	[12],[15],[28]							10.00%
PIK Rate	[12],[15],[28]							10.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[15],[28]				415
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Total Rate	[12],[15],[28]							20.00%
PIK Rate	[12],[15],[28]							20.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[15],[28]				279
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[12],[14],[44]							12.22%
Spread	[12],[14],[44]							6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14],[44]				752
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[12],[14]							12.22%
Spread	[12],[14]							6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				11,436
Investment, Identifier [Axis]: Infinity X1 Holdings, LLC, Preferred Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,000
Ending balance	[17]	$ 1,730			$ 1,730
Investment, Identifier [Axis]: Infinity X1 Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%			13.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 4,314
Ending balance		$ 3,766			3,766
Investment, Identifier [Axis]: Infolinks Media Buyco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[12],[14]							11.21%
Spread	[12],[14]							5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				1,881
Investment, Identifier [Axis]: Infolinks Media Buyco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[12],[14]							11.21%
Spread	[12],[14]							5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				9,690
Investment, Identifier [Axis]: Insight Borrower Corporation, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12]				239
Ending balance	[16]	$ 130			$ 130
Investment, Identifier [Axis]: Insight Borrower Corporation, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6.25%	[16],[18],[19]		6.25%	[16],[18],[19]		6.25%	[12],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[13],[14]				$ (40)
Ending balance	[16],[18],[19]	$ (34)			$ (34)
Investment, Identifier [Axis]: Insight Borrower Corporation, Secured Debt 2
Schedule of Investments [Line Items]
Spread		6.25%	[16],[18],[19]		6.25%	[16],[18],[19]		6.25%	[12],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[13],[14]				$ (33)
Ending balance	[16],[18],[19]	$ (29)			$ (29)
Investment, Identifier [Axis]: Insight Borrower Corporation, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11.53%	[16],[18]		11.53%	[16],[18]		11.65%	[12],[14]
Spread		6.25%	[16],[18]		6.25%	[16],[18]		6.25%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 8,287
Ending balance	[16],[18]	$ 7,880			7,880
Investment, Identifier [Axis]: Inspire Aesthetics Management, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12]				190
Ending balance	[16]	$ 10			$ 10
Investment, Identifier [Axis]: Inspire Aesthetics Management, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.03%	[16],[18],[27]		13.03%	[16],[18],[27]		13.53%	[12],[14],[45]
Spread		8.00%	[16],[18],[27]		8.00%	[16],[18],[27]		8.00%	[12],[14],[45]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14],[45]				$ 664
Ending balance	[16],[18],[27]	$ 609			$ 609
Investment, Identifier [Axis]: Inspire Aesthetics Management, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.27%	[16],[18]		13.27%	[16],[18]		13.55%	[12],[14]
Spread		8.00%	[16],[18]		8.00%	[16],[18]		8.00%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 6,144
Ending balance	[16],[18]	$ 5,591			$ 5,591
Investment, Identifier [Axis]: Inspire Aesthetics Management, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		13.27%	[16],[18]		13.27%	[16],[18]		13.55%	[12],[14]
Spread		8.00%	[16],[18]		8.00%	[16],[18]		8.00%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 1,237
Ending balance	[16],[18]	$ 1,126			1,126
Investment, Identifier [Axis]: Integral Energy Services, Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					450		(1,160)
Amount of Interest, Fees or Dividends Credited to Income					38		38
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					190	[12]	1,490
Gross Additions					450		0
Gross Reductions					0		1,160
Ending balance		$ 640	[16]	$ 330	$ 640	[16]	$ 330
Investment, Identifier [Axis]: Integral Energy Services, Preferred Equity
Schedule of Investments [Line Items]
Total Rate		10.00%	[16],[17]		10.00%	[16],[17]		10.00%	[12]
PIK Rate		10.00%	[16],[17]		10.00%	[16],[17]		10.00%	[12]
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					153
Amount of Interest, Fees or Dividends Credited to Income					24
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12]				350
Gross Additions					177
Gross Reductions					0
Ending balance	[16],[17]	$ 527			$ 527
Investment, Identifier [Axis]: Integral Energy Services, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.09%	[16],[18]	13.01%	13.09%	[16],[18]	13.01%	13.16%	[12],[14]
Spread		7.50%	[16],[18]	7.50%	7.50%	[16],[18]	7.50%	7.50%	[12],[14]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					273		(876)
Amount of Interest, Fees or Dividends Credited to Income					1,633		1,842
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					16,232	[12],[14]	18,425
Gross Additions					342		58
Gross Reductions					1,835		876
Ending balance		$ 14,739	[16],[18]	$ 17,607	14,739	[16],[18]	17,607
Investment, Identifier [Axis]: Interface Security Systems, L.L.C, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12]				0
Ending balance	[16]	$ 0			$ 0
Investment, Identifier [Axis]: Interface Security Systems, L.L.C, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		15.06%	[16],[26],[27]		15.06%	[16],[26],[27]		15.48%	[12],[25],[46]
Spread		10.00%	[16],[26],[27]		10.00%	[16],[26],[27]		10.00%	[12],[25],[46]
PIK Rate	[16],[26],[27]	15.22%			15.22%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[25],[46]				$ 1,781
Ending balance	[16],[26],[27]	$ 1,842			$ 1,842
Investment, Identifier [Axis]: Interface Security Systems, L.L.C, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.35%	[16],[18],[23],[26]		12.35%	[16],[18],[23],[26]		12.46%	[12],[14],[24],[25]
Spread		7.00%	[16],[18],[23],[26]		7.00%	[16],[18],[23],[26]		7.00%	[12],[14],[24],[25]
PIK Rate		12.35%	[16],[18],[23],[26]		12.35%	[16],[18],[23],[26]		12.46%	[12],[14],[24],[25]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14],[24],[25]				$ 433
Ending balance	[16],[18],[23],[26]	$ 11			11
Investment, Identifier [Axis]: Intermedia Holdings, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate	[8],[14]							11.47%
Spread	[8],[14]							6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[8],[14]				$ 5,370
Investment, Identifier [Axis]: Invincible Boat Company, LLC., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.29%	[16],[18],[27]		11.29%	[16],[18],[27]		12.00%	[12],[14]
Spread		6.50%	[16],[18],[27]		6.50%	[16],[18],[27]		6.50%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 509
Ending balance	[16],[18],[27]	$ 991			$ 991
Investment, Identifier [Axis]: Invincible Boat Company, LLC., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.25%	[16],[18]		11.25%	[16],[18]		12.00%	[12],[14]
Spread		6.50%	[16],[18]		6.50%	[16],[18]		6.50%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 16,515
Ending balance	[16],[18]	$ 16,070			$ 16,070
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.00%			13.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 724			$ 724
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate		13.00%			13.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 4,339			$ 4,339
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					670
Ending balance		$ 710			$ 710
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Preferred Equity
Schedule of Investments [Line Items]
Total Rate		25.00%			25.00%
PIK Rate		25.00%			25.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 190			$ 190
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.00%			13.00%			13.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 1,108
Ending balance		$ 1,112			1,112
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate								13.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 722
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		13.00%			13.00%			13.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 2,236
Ending balance		$ 2,236			2,236
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate								13.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 4,815
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 5
Schedule of Investments [Line Items]
Total Rate		13.00%			13.00%			13.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 2,525
Ending balance		$ 2,431			2,431
Investment, Identifier [Axis]: Isagenix International, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[8]				0
Ending balance	[9]	$ 0			$ 0
Investment, Identifier [Axis]: Isagenix International, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		11.89%	[9],[18]		11.89%	[9],[18]		11.04%	[8],[14]
Spread		6.60%	[9],[18]		6.60%	[9],[18]		5.50%	[8],[14]
PIK Rate		9.43%	[9],[18]		9.43%	[9],[18]		8.54%	[8],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[8],[14]				$ 2,301
Ending balance	[9],[18]	$ 797			$ 797
Investment, Identifier [Axis]: Island Pump and Tank, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread	[16],[18],[19]	6.50%			6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18],[19]	$ (6)			$ (6)
Investment, Identifier [Axis]: Island Pump and Tank, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[16],[18]	11.09%			11.09%
Spread	[16],[18]	5.50%			5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18]	$ 1,686			$ 1,686
Investment, Identifier [Axis]: Island Pump and Tank, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[16],[18]	12.09%			12.09%
Spread	[16],[18]	6.50%			6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18]	$ 1,686			$ 1,686
Investment, Identifier [Axis]: Island Pump and Tank, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate	[16],[18]	13.09%			13.09%
Spread	[16],[18]	7.50%			7.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18]	$ 1,686			$ 1,686
Investment, Identifier [Axis]: JDC Power Services, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread	[16],[18],[19]	6.75%			6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18],[19]	$ (49)			$ (49)
Investment, Identifier [Axis]: JDC Power Services, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[16],[18]	11.35%			11.35%
Spread	[16],[18]	6.75%			6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18]	$ 17,076			$ 17,076
Investment, Identifier [Axis]: JTI Electrical & Mechanical, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12]				140
Ending balance	[16]	$ 20			$ 20
Investment, Identifier [Axis]: JTI Electrical & Mechanical, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.37%	[16],[18],[27]		13.37%	[16],[18],[27]		11.64%	[12],[14],[47]
Spread		8.00%	[16],[18],[27]		8.00%	[16],[18],[27]		6.00%	[12],[14],[47]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14],[47]				$ 261
Ending balance	[16],[18],[27]	$ 664			$ 664
Investment, Identifier [Axis]: JTI Electrical & Mechanical, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.85%	[16],[18]		12.85%	[16],[18]		11.61%	[12],[14]
Spread		8.00%	[16],[18]		8.00%	[16],[18]		6.00%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 3,000
Ending balance	[16],[18]	$ 2,820			$ 2,820
Investment, Identifier [Axis]: JTI Electrical & Mechanical, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[16],[18]	12.85%			12.85%
Spread	[16],[18]	8.00%			8.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18]	$ 264			$ 264
Investment, Identifier [Axis]: Jackmont Hospitality, Inc., Preferred Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12]				2,190
Ending balance	[16]	$ 1,740			$ 1,740
Investment, Identifier [Axis]: Jackmont Hospitality, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.86%	[16],[18],[48]		12.86%	[16],[18],[48]		12.46%	[12],[14],[49]
Spread		7.50%	[16],[18],[48]		7.50%	[16],[18],[48]		7.00%	[12],[14],[49]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14],[49]				$ 1,675
Ending balance	[16],[18],[48]	$ 1,607			$ 1,607
Investment, Identifier [Axis]: Jackmont Hospitality, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		15.28%	[16],[18]		15.28%	[16],[18]		12.46%	[12],[14]
Spread		10.00%	[16],[18]		10.00%	[16],[18]		7.00%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 3,948
Ending balance	[16],[18]	$ 1,251			$ 1,251
Investment, Identifier [Axis]: Jackmont Hospitality, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[16],[18]	12.90%			12.90%
Spread	[16],[18]	7.50%			7.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18]	$ 3,738			$ 3,738
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[8]				0
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Common Stock 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[9]	0			0
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Common Stock 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[9]	$ 166			$ 166
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		21.59%	[9],[18],[23]		21.59%	[9],[18],[23]		23.63%	[8],[14],[24]
Spread		16.00%	[9],[18],[23]		16.00%	[9],[18],[23]		18.00%	[8],[14],[24]
PIK Rate		21.59%	[9],[18],[23]		21.59%	[9],[18],[23]		23.63%	[8],[14],[24]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[8],[14],[24]				$ 1,747
Ending balance	[9],[18],[23]	$ 0			$ 0
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		21.59%	[9],[18],[23]		21.59%	[9],[18],[23]		21.63%	[8],[14],[24]
Spread		16.00%	[9],[18],[23]		16.00%	[9],[18],[23]		16.00%	[8],[14],[24]
PIK Rate		21.59%	[9],[18],[23]		21.59%	[9],[18],[23]		21.63%	[8],[14],[24]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[8],[14],[24]				$ 121
Ending balance	[9],[18],[23]	$ 0			$ 0
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		13.45%	[9],[18]		13.45%	[9],[18]		21.63%	[8],[14],[24]
Spread		8.75%	[9],[18]		8.75%	[9],[18]		16.00%	[8],[14],[24]
PIK Rate		6.00%	[9],[18]		6.00%	[9],[18]		21.63%	[8],[14],[24]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[8],[14],[24]				$ 117
Ending balance	[9],[18]	$ 1,666			$ 1,666
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate	[9],[18]	13.45%			13.45%
Spread	[9],[18]	8.75%			8.75%
PIK Rate	[9],[18]	13.45%			13.45%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[9],[18]	$ 1,055			$ 1,055
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Preferred Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,070
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Secured Debt 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[13]				0
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate								15.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,690
Investment, Identifier [Axis]: JorVet Holdings, LLC, Preferred Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[15]				1,193
Ending balance	[17]	$ 1,250			$ 1,250
Investment, Identifier [Axis]: JorVet Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%			12.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 2,814
Ending balance		$ 2,723			$ 2,723
Investment, Identifier [Axis]: KMS, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		14.50%	[16],[18],[23]		14.50%	[16],[18],[23]		14.75%	[12],[14]
Spread		9.75%	[16],[18],[23]		9.75%	[16],[18],[23]		9.25%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 1,180
Ending balance	[16],[18],[23]	$ 967			$ 967
Investment, Identifier [Axis]: KMS, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.50%	[16],[18],[23]		14.50%	[16],[18],[23]		14.75%	[12],[14]
Spread		9.75%	[16],[18],[23]		9.75%	[16],[18],[23]		9.25%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 8,475
Ending balance	[16],[18],[23]	$ 6,966			6,966
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(60)		2
Amount of Interest, Fees or Dividends Credited to Income					24		23
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					683	[28]	713
Gross Additions					0		3
Gross Reductions					60		1
Ending balance		623	[17],[29]	715	623	[17],[29]	715
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					640		410
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,420		1,800
Gross Additions					640		410
Gross Reductions					0		0
Ending balance		$ 3,060		$ 2,210	$ 3,060		$ 2,210
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.00%		12.00%	12.00%		12.00%	12.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					429		513
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					4,933		5,093
Gross Additions					6		56
Gross Reductions					800		199
Ending balance		$ 4,139		$ 4,950	$ 4,139		$ 4,950
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		9.00%		9.00%	9.00%		9.00%	9.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					66		66
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					951		961
Gross Additions					41		0
Gross Reductions					8		7
Ending balance		$ 984		$ 954	$ 984		954
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.43%	[16],[18]		12.43%	[16],[18]		12.71%	[12],[14]
Spread		7.25%	[16],[18]		7.25%	[16],[18]		7.25%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 7,960
Ending balance	[16],[18]	$ 601			$ 601
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.60%	[16],[18]		12.60%	[16],[18]		12.71%	[12],[14]
Spread		7.25%	[16],[18]		7.25%	[16],[18]		7.25%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 5,246
Ending balance	[16],[18]	$ 7,872			$ 7,872
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12.60%	[16],[18]		12.60%	[16],[18]		12.71%	[12],[14]
Spread		7.25%	[16],[18]		7.25%	[16],[18]		7.25%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 0
Ending balance	[16],[18]	$ 5,194			$ 5,194
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt 4
Schedule of Investments [Line Items]
Total Rate		12.60%	[16],[18]		12.60%	[16],[18]		12.71%	[12],[14]
Spread		7.25%	[16],[18]		7.25%	[16],[18]		7.25%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 871
Ending balance	[16],[18]	$ 863			$ 863
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt 5
Schedule of Investments [Line Items]
Total Rate		12.60%	[16],[18]		12.60%	[16],[18]		12.71%	[12],[14]
Spread		7.25%	[16],[18]		7.25%	[16],[18]		7.25%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 8,822
Ending balance	[16],[18]	$ 8,737			$ 8,737
Investment, Identifier [Axis]: LLFlex, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.48%	[16],[18]		13.48%	[16],[18]		15.54%	[12],[14]
Spread		8.00%	[16],[18]		8.00%	[16],[18]		9.00%	[12],[14]
PIK Rate		3.00%	[16],[18]		3.00%	[16],[18]		1.00%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 4,417
Ending balance	[16],[18]	$ 3,724			$ 3,724
Investment, Identifier [Axis]: Lightbox Holdings, L.P., Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.11%	[9]		10.11%	[9]		10.62%	[8]
Spread		5.00%	[9]		5.00%	[9]		5.00%	[8]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[8]				$ 5,592
Ending balance	[9]	$ 5,548			$ 5,548
Investment, Identifier [Axis]: Logix Acquisition Company, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.25%	[16],[18]		13.25%	[16],[18]		13.25%	[12],[14]
Spread		4.75%	[16],[18]		4.75%	[16],[18]		4.75%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 9,069
Ending balance	[16],[18]	$ 8,578			8,578
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[8],[14]							11.46%
Spread	[8],[14]							6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[8],[14]				2,803
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[8],[14]							11.46%
Spread	[8],[14]							6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[8],[14]				3,925
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[8],[14]							11.46%
Spread	[8],[14]							6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[8],[14]				3,464
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate	[8],[14]							11.46%
Spread	[8],[14]							6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[8],[14]				7,796
Investment, Identifier [Axis]: MH Corbin Holding LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(80)		80
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					80		0
Gross Additions					0		80
Gross Reductions					80		0
Ending balance		0		80	0		80
Investment, Identifier [Axis]: MH Corbin Holding LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0		0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 0		$ 0	$ 0		$ 0
Investment, Identifier [Axis]: MH Corbin Holding LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		14.00%		13.00%	14.00%		13.00%	13.00%	[25]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(871)		307
Amount of Interest, Fees or Dividends Credited to Income					139		145
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,256	[25]	1,137
Gross Additions					0		308
Gross Reductions					911		169
Ending balance		$ 345		$ 1,276	$ 345		1,276
Investment, Identifier [Axis]: Mako Steel, LP, Secured Debt 1
Schedule of Investments [Line Items]
Spread		7.50%	[16],[18],[19]		7.50%	[16],[18],[19]		6.75%	[12],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[13],[14]				$ 0
Ending balance	[16],[18],[19]	$ 0			$ 0
Investment, Identifier [Axis]: Mako Steel, LP, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.59%	[16],[18]		12.59%	[16],[18]		12.28%	[12],[14]
Spread		7.50%	[16],[18]		7.50%	[16],[18]		6.75%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 16,721
Ending balance	[16],[18]	$ 21,222			21,222
Investment, Identifier [Axis]: Market Force Information, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							(4,160)
Amount of Unrealized Gain/(Loss)							4,160
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							0
Gross Additions							4,160
Gross Reductions							4,160
Ending balance				0			0
Investment, Identifier [Axis]: Market Force Information, LLC, Secured Debt
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							(6,465)
Amount of Unrealized Gain/(Loss)							6,060
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							403
Gross Additions							6,060
Gross Reductions							6,463
Ending balance				0			0
Investment, Identifier [Axis]: Metalforming Holdings, LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					110
Ending balance		$ 290			$ 290
Investment, Identifier [Axis]: Metalforming Holdings, LLC, Preferred Equity
Schedule of Investments [Line Items]
Total Rate		8.00%	[17]		8.00%	[17]		8.00%	[15]
PIK Rate		8.00%	[17]		8.00%	[17]		8.00%	[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[15]				$ 443
Ending balance	[17]	$ 460			460
Investment, Identifier [Axis]: Metalforming Holdings, LLC, Secured Debt 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[13]				0
Ending balance	[19]	$ 0			$ 0
Investment, Identifier [Axis]: Metalforming Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.75%			10.75%			12.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 1,707
Ending balance		$ 1,633			$ 1,633
Investment, Identifier [Axis]: Microbe Formulas, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6.00%	[16],[18],[19]		6.00%	[16],[18],[19]		6.25%	[12],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[13],[14]				$ (6)
Ending balance	[16],[18],[19]	$ (5)			$ (5)
Investment, Identifier [Axis]: Microbe Formulas, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.95%	[16],[18]		10.95%	[16],[18]		11.46%	[12],[14]
Spread		6.00%	[16],[18]		6.00%	[16],[18]		6.00%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 2,671
Ending balance	[16],[18]	$ 2,497			$ 2,497
Investment, Identifier [Axis]: Mills Fleet Farm Group, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12.56%	[16],[18]		12.56%	[16],[18]		12.52%	[12],[14]
Spread		7.00%	[16],[18]		7.00%	[16],[18]		7.00%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 17,524
Ending balance	[16],[18]	$ 16,242			16,242
Investment, Identifier [Axis]: Mini Melts of America, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12]				300
Ending balance	[16]	$ 300			$ 300
Investment, Identifier [Axis]: Mini Melts of America, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[16],[18],[27]	11.37%			11.37%
Spread		6.25%	[16],[18],[27]		6.25%	[16],[18],[27]		6.25%	[12],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[13],[14]				$ (28)
Ending balance	[16],[18],[27]	$ 975			$ 975
Investment, Identifier [Axis]: Mini Melts of America, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[16],[18],[48]	11.33%			11.33%
Spread		6.25%	[16],[18],[48]		6.25%	[16],[18],[48]		6.25%	[12],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[13],[14]				$ (10)
Ending balance	[16],[18],[48]	$ 860			$ 860
Investment, Identifier [Axis]: Mini Melts of America, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		10.31%	[16],[18]		10.31%	[16],[18]		10.64%	[12],[14]
Spread		5.25%	[16],[18]		5.25%	[16],[18]		5.25%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 3,149
Ending balance	[16],[18]	$ 3,209			$ 3,209
Investment, Identifier [Axis]: Mini Melts of America, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate		12.31%	[16],[18]		12.31%	[16],[18]		12.64%	[12],[14]
Spread		7.25%	[16],[18]		7.25%	[16],[18]		7.25%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 3,146
Ending balance	[16],[18]	$ 3,209			$ 3,209
Investment, Identifier [Axis]: MoneyThumb Acquisition, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Total Rate	[17]	12.00%			12.00%
PIK Rate	[17]	12.00%			12.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[17]	$ 414			$ 414
Investment, Identifier [Axis]: MoneyThumb Acquisition, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		14.00%			14.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 2,186			$ 2,186
Investment, Identifier [Axis]: MoneyThumb Acquisition, LLC, Warrants
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11]	148			148
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[30],[31]				197
Ending balance	[16],[32],[33]	$ 211			$ 211
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		14.00%	[16],[32],[33]		14.00%	[16],[32],[33]		14.00%	[12],[30],[31]
PIK Rate		4.00%	[16],[32],[33]		4.00%	[16],[32],[33]		4.00%	[12],[30],[31]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[30],[31]				$ 1,133
Ending balance	[16],[32],[33]	$ 1,181			$ 1,181
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.00%	[16],[32],[33]		14.00%	[16],[32],[33]		14.00%	[12],[30],[31]
PIK Rate		4.00%	[16],[32],[33]		4.00%	[16],[32],[33]		4.00%	[12],[30],[31]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[30],[31]				$ 3,184
Ending balance	[16],[32],[33]	$ 3,319			$ 3,319
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		14.00%	[16],[32],[33]		14.00%	[16],[32],[33]		14.00%	[12],[30],[31]
PIK Rate		4.00%	[16],[32],[33]		4.00%	[16],[32],[33]		4.00%	[12],[30],[31]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[30],[31]				$ 4,957
Ending balance	[16],[32],[33]	$ 5,109			$ 5,109
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Unsecured Debt 1
Schedule of Investments [Line Items]
Total Rate	[16],[32],[33]	8.00%			8.00%
PIK Rate	[16],[32],[33]	8.00%			8.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[32],[33]	$ 32			$ 32
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Unsecured Debt 2
Schedule of Investments [Line Items]
Total Rate	[16],[32],[33]	8.00%			8.00%
PIK Rate	[16],[32],[33]	8.00%			8.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[32],[33]	$ 16			$ 16
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Unsecured Debt 3
Schedule of Investments [Line Items]
Total Rate	[16],[32],[33]	8.00%			8.00%
PIK Rate	[16],[32],[33]	8.00%			8.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[32],[33]	$ 30			$ 30
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(68)		1,080
Amount of Interest, Fees or Dividends Credited to Income					735		785
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					6,598	[15]	5,708
Gross Additions					0		1,080
Gross Reductions					68		0
Ending balance		6,530	[17]	6,788	6,530	[17]	6,788
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					1		1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[13]	0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 0	[19]	$ 0	$ 0	[19]	$ 0
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.00%		10.00%	10.00%		10.00%	10.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					4		0
Amount of Interest, Fees or Dividends Credited to Income					110		109
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,436		1,436
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 1,436		$ 1,436	1,436		1,436
Investment, Identifier [Axis]: Nello Industries Investco, LLC, Common Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					55
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					3,030
Gross Reductions					0
Ending balance		$ 3,030			$ 3,030
Investment, Identifier [Axis]: Nello Industries Investco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.50%			13.50%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					293
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					6,609
Gross Reductions					0
Ending balance		$ 6,609			6,609
Investment, Identifier [Axis]: Nello Industries Investco, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[17]	$ 3,030			$ 3,030
Investment, Identifier [Axis]: Nello Industries Investco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[18]	11.75%			11.75%
Spread	[18]	6.50%			6.50%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					126
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					4,188
Gross Reductions					600
Ending balance	[18]	$ 3,588			$ 3,588
Investment, Identifier [Axis]: Nello Industries Investco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.50%			13.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 6,609			$ 6,609
Investment, Identifier [Axis]: NexRev LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					870		1,310
Amount of Interest, Fees or Dividends Credited to Income					161		43
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,590	[15]	280
Gross Additions					870		1,310
Gross Reductions					0		0
Ending balance		$ 2,460	[17]	1,590	$ 2,460	[17]	1,590
Investment, Identifier [Axis]: NexRev LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		10.00%			10.00%
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					25		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[13]	0
Gross Additions					790		0
Gross Reductions					300		0
Ending balance		$ 490		$ 0	$ 490		$ 0
Investment, Identifier [Axis]: NexRev LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.00%		10.00%	10.00%		10.00%	10.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					6		708
Amount of Interest, Fees or Dividends Credited to Income					198		223
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,435		2,119
Gross Additions					18		725
Gross Reductions					0		413
Ending balance		$ 2,453		$ 2,431	$ 2,453		2,431
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6.50%	[16],[18],[19]		6.50%	[16],[18],[19]		7.00%	[12],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[13],[14]				$ (3)
Ending balance	[16],[18],[19]	$ (3)			$ (3)
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[16],[18]	11.98%			11.98%
Spread		6.50%	[16],[18]		6.50%	[16],[18]		7.00%	[12],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[13],[14]				$ (12)
Ending balance	[16],[18]	$ 14,651			14,651
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[12],[14]							12.54%
Spread	[12],[14]							7.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				10,991
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate	[12],[14]							12.52%
Spread	[12],[14]							7.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				3,878
Investment, Identifier [Axis]: NuStep, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							300
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,290		2,010
Gross Additions							300
Gross Reductions							0
Ending balance		1,440		2,310	1,440		2,310
Investment, Identifier [Axis]: NuStep, LLC, Preferred Member Units 1.1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					92
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,310
Gross Additions					350
Gross Reductions					0
Ending balance		2,660			2,660
Investment, Identifier [Axis]: NuStep, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,310		1,290
Gross Additions							0
Gross Reductions							0
Ending balance		2,660		$ 1,290	2,660		$ 1,290
Investment, Identifier [Axis]: NuStep, LLC, Preferred Member Units 2.1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					20
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,290
Gross Additions					150
Gross Reductions					0
Ending balance		$ 1,440			$ 1,440
Investment, Identifier [Axis]: NuStep, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.85%	[18]	11.98%	11.85%	[18]	11.98%	11.98%	[14]
Spread		6.50%	[18]	6.50%	6.50%	[18]	6.50%	6.50%	[14]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		(2)
Amount of Interest, Fees or Dividends Credited to Income					83		92
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					899	[14]	1,100
Gross Additions					1		1
Gross Reductions					0		203
Ending balance		$ 900	[18]	$ 898	$ 900	[18]	$ 898
Investment, Identifier [Axis]: NuStep, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.00%		12.00%	12.00%		12.00%	12.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					424		422
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					4,606		4,603
Gross Additions					3		3
Gross Reductions					0		0
Ending balance		$ 4,609		$ 4,606	4,609		4,606
Investment, Identifier [Axis]: Obra Capital, Inc. (f/k/a Vida Capital, Inc.), Secured Debt
Schedule of Investments [Line Items]
Total Rate	[8]							11.47%
Spread	[8]							6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[8]				$ 6,039
Investment, Identifier [Axis]: Obra Capital, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Spread	[16],[18],[19]	7.50%			7.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18],[19]	$ (14)			$ (14)
Investment, Identifier [Axis]: Obra Capital, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[16],[18]	12.53%			12.53%
Spread	[16],[18]	7.50%			7.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18]	$ 11,514			$ 11,514
Investment, Identifier [Axis]: OnPoint, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[16],[18]	11.60%			11.60%
Spread	[16],[18]	7.00%			7.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18]	$ 2,886			$ 2,886
Investment, Identifier [Axis]: Oneliance, LLC, Preferred Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					268		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					282		264
Gross Additions					268		18
Gross Reductions					0		0
Ending balance		$ 550		$ 282	$ 550		$ 282
Investment, Identifier [Axis]: Oneliance, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				16.48%			16.48%	16.48%	[14]
Spread		10.00%		11.00%	10.00%		11.00%	11.00%	[14]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					7		(7)
Amount of Interest, Fees or Dividends Credited to Income					142		172
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,339	[14]	1,380
Gross Additions					21		4
Gross Reductions					1,360		27
Ending balance		$ 0		$ 1,357	0		1,357
Investment, Identifier [Axis]: Orttech Holdings, LLC, Preferred Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(590)		1,320
Amount of Interest, Fees or Dividends Credited to Income					97		227
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					4,260	[15],[28]	2,940
Gross Additions					0		1,320
Gross Reductions					590		0
Ending balance		$ 3,670	[17],[29]	$ 4,260	$ 3,670	[17],[29]	$ 4,260
Investment, Identifier [Axis]: Orttech Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		11.00%	[18],[19]	11.00%	11.00%	[18],[19]	11.00%	11.00%	[13],[14]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(1)		2
Amount of Interest, Fees or Dividends Credited to Income					1		1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[13],[14]	(2)
Gross Additions					1		2
Gross Reductions					1		0
Ending balance		$ 0	[18],[19]	$ 0	$ 0	[18],[19]	$ 0
Investment, Identifier [Axis]: Orttech Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		16.35%	[18]	16.48%	16.35%	[18]	16.48%	16.48%	[14]
Spread		11.00%	[18]	11.00%	11.00%	[18]	11.00%	11.00%	[14]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(17)		64
Amount of Interest, Fees or Dividends Credited to Income					705		716
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					5,510	[14]	5,814
Gross Additions					17		86
Gross Reductions					37		350
Ending balance		$ 5,490	[18]	$ 5,550	5,490	[18]	5,550
Investment, Identifier [Axis]: Other Amounts related to investments transferred to or from other 1940 Act classification during the period
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							(1,541)
Amount of Unrealized Gain/(Loss)							649
Amount of Interest, Fees or Dividends Credited to Income							(151)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							0
Gross Additions							0
Gross Reductions							0
Ending balance				0			0
Investment, Identifier [Axis]: Other Amounts related to investments transferred to or from other 1940 Act classification during the period, Affiliate Investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					(12,834)
Gross Additions					0
Gross Reductions					0
Ending balance		0			0
Investment, Identifier [Axis]: Other Amounts related to investments transferred to or from other 1940 Act classification during the period, Control Investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		1,541
Amount of Unrealized Gain/(Loss)					0		(649)
Amount of Interest, Fees or Dividends Credited to Income					0		(94)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0		(6,392)
Gross Additions					0		6,392
Gross Reductions					0		0
Ending balance		$ 0		0	$ 0		0
Investment, Identifier [Axis]: PTL US Bidco, Inc, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.19%	[16],[18],[27],[32],[33]		12.19%	[16],[18],[27],[32],[33]		12.80%	[12],[14],[30],[31],[50]
Spread		6.75%	[16],[18],[27],[32],[33]		6.75%	[16],[18],[27],[32],[33]		7.25%	[12],[14],[30],[31],[50]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14],[30],[31],[50]				$ 196
Ending balance	[16],[18],[27],[32],[33]	$ 442			$ 442
Investment, Identifier [Axis]: PTL US Bidco, Inc, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.13%	[16],[18],[32],[33]		12.13%	[16],[18],[32],[33]		12.88%	[12],[14],[30],[31]
Spread		6.75%	[16],[18],[32],[33]		6.75%	[16],[18],[32],[33]		7.25%	[12],[14],[30],[31]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14],[30],[31]				$ 1,720
Ending balance	[16],[18],[32],[33]	$ 1,403			1,403
Investment, Identifier [Axis]: Paragon Healthcare, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Spread	[12],[13],[14]							5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[13],[14]				0
Investment, Identifier [Axis]: Paragon Healthcare, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[12],[14],[51]							11.24%
Spread	[12],[14],[51]							5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14],[51]				421
Investment, Identifier [Axis]: Paragon Healthcare, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[12],[14]							11.25%
Spread	[12],[14]							5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				2,442
Investment, Identifier [Axis]: Peaches Holding Corporation, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		1,805			1,805
Investment, Identifier [Axis]: Pinnacle TopCo, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					1,205
Amount of Interest, Fees or Dividends Credited to Income					430
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,135
Gross Additions					1,205
Gross Reductions					0
Ending balance	[17]	4,340			4,340
Investment, Identifier [Axis]: Pinnacle TopCo, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate								8.00%
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					8
Amount of Interest, Fees or Dividends Credited to Income					4
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					105
Gross Additions					10
Gross Reductions					115
Ending balance	[19]	$ 0			$ 0
Investment, Identifier [Axis]: Pinnacle TopCo, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.00%			13.00%			13.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					152
Amount of Interest, Fees or Dividends Credited to Income					783
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					7,472
Gross Additions					188
Gross Reductions					400
Ending balance		$ 7,260			7,260
Investment, Identifier [Axis]: Power System Solutions, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12]				500
Ending balance	[16]	$ 1,360			$ 1,360
Investment, Identifier [Axis]: Power System Solutions, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6.50%	[16],[18],[19]		6.50%	[16],[18],[19]		6.75%	[12],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[13],[14]				$ (35)
Ending balance	[16],[18],[19]	$ (29)			$ (29)
Investment, Identifier [Axis]: Power System Solutions, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[16],[18]	11.35%			11.35%
Spread		6.50%	[16],[18]		6.50%	[16],[18]		6.75%	[12],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[13],[14]				$ (35)
Ending balance	[16],[18]	$ 2,646			$ 2,646
Investment, Identifier [Axis]: Power System Solutions, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11.60%	[16],[18]		11.60%	[16],[18]		12.12%	[12],[14]
Spread		6.50%	[16],[18]		6.50%	[16],[18]		6.75%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 7,939
Ending balance	[16],[18]	$ 7,879			$ 7,879
Investment, Identifier [Axis]: PrimeFlight Aviation Services, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		10.58%	[16],[18]		10.58%	[16],[18]		12.28%	[12],[14]
Spread		5.50%	[16],[18]		5.50%	[16],[18]		6.85%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 5,970
Ending balance	[16],[18]	$ 5,925			$ 5,925
Investment, Identifier [Axis]: PrimeFlight Aviation Services, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.10%	[16],[18]		10.10%	[16],[18]		12.20%	[12],[14]
Spread		5.50%	[16],[18]		5.50%	[16],[18]		6.85%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 570
Ending balance	[16],[18]	$ 566			$ 566
Investment, Identifier [Axis]: PrimeFlight Aviation Services, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[16],[18]	10.10%			10.10%
Spread	[16],[18]	5.50%			5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18]	$ 569			$ 569
Investment, Identifier [Axis]: PrimeFlight Aviation Services, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate	[16],[18]	9.85%			9.85%
Spread	[16],[18]	5.25%			5.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18]	$ 646			$ 646
Investment, Identifier [Axis]: Purge Rite, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16]	520			520
Investment, Identifier [Axis]: Purge Rite, LLC, Preferred Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12]				1,302
Ending balance	[16]	$ 1,289			$ 1,289
Investment, Identifier [Axis]: Purge Rite, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		8.00%	[16],[18],[19]		8.00%	[16],[18],[19]		8.00%	[12],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[13],[14]				$ (19)
Ending balance	[16],[18],[19]	$ (16)			$ (16)
Investment, Identifier [Axis]: Purge Rite, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.64%	[16],[18]		13.64%	[16],[18]		13.70%	[12],[14]
Spread		8.00%	[16],[18]		8.00%	[16],[18]		8.00%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 3,813
Ending balance	[16],[18]	$ 3,906			3,906
Investment, Identifier [Axis]: RA Outdoors LLC, Common Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					0
Gross Reductions					0
Ending balance	[16]	$ 0			$ 0
Investment, Identifier [Axis]: RA Outdoors LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.59%	[16],[18]		11.59%	[16],[18]		12.22%	[12],[14],[44]
Spread		6.75%	[16],[18]		6.75%	[16],[18]		6.75%	[12],[14],[44]
PIK Rate	[16],[18]	11.59%			11.59%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(70)
Amount of Interest, Fees or Dividends Credited to Income					27
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14],[44]				745
Gross Additions					481
Gross Reductions					36
Ending balance	[16],[18]	$ 1,190			$ 1,190
Investment, Identifier [Axis]: RA Outdoors LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.59%	[16],[18]		11.59%	[16],[18]		12.21%	[12],[14]
Spread		6.75%	[16],[18]		6.75%	[16],[18]		6.75%	[12],[14]
PIK Rate	[16],[18]	11.59%			11.59%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(737)
Amount of Interest, Fees or Dividends Credited to Income					284
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				12,089
Gross Additions					448
Gross Reductions					96
Ending balance	[16],[18]	$ 12,441			12,441
Investment, Identifier [Axis]: Research Now Group, Inc. and Survey Sampling International, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[8],[14]							11.14%
Spread	[8],[14]							5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[8],[14]				$ 7,237
Investment, Identifier [Axis]: Richardson Sales Solutions, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.92%	[16],[18],[27]		11.92%	[16],[18],[27]		18.47%	[12],[14],[52]
Spread		6.75%	[16],[18],[27]		6.75%	[16],[18],[27]		6.50%	[12],[14],[52]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14],[52]				$ 818
Ending balance	[16],[18],[27]	$ 1,313			$ 1,313
Investment, Identifier [Axis]: Richardson Sales Solutions, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.03%	[16],[18]		12.03%	[16],[18]		11.88%	[12],[14]
Spread		6.75%	[16],[18]		6.75%	[16],[18]		6.50%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 10,362
Ending balance	[16],[18]	$ 10,194			$ 10,194
Investment, Identifier [Axis]: Richardson Sales Solutions, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[16],[18]	11.86%			11.86%
Spread	[16],[18]	6.75%			6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18]	$ 5,018			$ 5,018
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		(1,340)
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0		1,650
Gross Additions					0		0
Gross Reductions					0		1,340
Ending balance		$ 0		310	$ 0		310
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Secured Debt 1
Schedule of Investments [Line Items]
PIK Rate	[19],[23]	10.00%			10.00%
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					1		3
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					(6)	[13]	(8)
Gross Additions					1		2
Gross Reductions					0		0
Ending balance		$ (5)	[19],[23]	$ (6)	$ (5)	[19],[23]	$ (6)
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.50%	[23]	12.50%	12.50%	[23]	12.50%	12.50%
PIK Rate	[23]	10.00%			10.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(1,662)		(43)
Amount of Interest, Fees or Dividends Credited to Income					123		382
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,421		3,902
Gross Additions					5		13
Gross Reductions					1,713		167
Ending balance		$ 1,713	[23]	$ 3,748	$ 1,713	[23]	3,748
Investment, Identifier [Axis]: Roof Opco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		8.00%	[16],[18],[19]		8.00%	[16],[18],[19]		6.50%	[12],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[13],[14]				$ 0
Ending balance	[16],[18],[19]	$ 0			$ 0
Investment, Identifier [Axis]: Roof Opco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.59%	[16],[18]		12.59%	[16],[18]		12.16%	[12],[14]
Spread		7.00%	[16],[18]		7.00%	[16],[18]		6.50%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 4,142
Ending balance	[16],[18]	$ 4,057			$ 4,057
Investment, Identifier [Axis]: Roof Opco, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		14.59%	[16],[18]		14.59%	[16],[18]		14.16%	[12],[14]
Spread		9.00%	[16],[18]		9.00%	[16],[18]		8.50%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 4,082
Ending balance	[16],[18]	$ 4,016			$ 4,016
Investment, Identifier [Axis]: Rug Doctor, LLC., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.79%	[16],[18]		12.79%	[16],[18]		13.54%	[12],[14]
Spread		8.00%	[16],[18]		8.00%	[16],[18]		6.00%	[12],[14]
PIK Rate		2.00%	[16],[18]		2.00%	[16],[18]		2.00%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 6,383
Ending balance	[16],[18]	$ 6,509			$ 6,509
Investment, Identifier [Axis]: Rug Doctor, LLC., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.79%	[16],[18]		12.79%	[16],[18]		13.54%	[12],[14]
Spread		8.00%	[16],[18]		8.00%	[16],[18]		6.00%	[12],[14]
PIK Rate		2.00%	[16],[18]		2.00%	[16],[18]		2.00%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 8,984
Ending balance	[16],[18]	$ 8,465			8,465
Investment, Identifier [Axis]: SI East, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					(1,000)
Amount of Interest, Fees or Dividends Credited to Income					665
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					6,390
Gross Additions					0
Gross Reductions					1,000
Ending balance		$ 5,390			$ 5,390
Investment, Identifier [Axis]: SI East, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.75%			11.75%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					64
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					375
Gross Additions					750
Gross Reductions					375
Ending balance		$ 750			750
Investment, Identifier [Axis]: SI East, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					(161)
Amount of Interest, Fees or Dividends Credited to Income					947
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					18,179
Gross Additions					0
Gross Reductions					18,179
Ending balance		$ 0			$ 0
Investment, Identifier [Axis]: SI East, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12.63%			12.63%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					22
Amount of Interest, Fees or Dividends Credited to Income					1,213
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					22,554
Gross Reductions					0
Ending balance		$ 22,554			22,554
Investment, Identifier [Axis]: SI East, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							1,188
Amount of Interest, Fees or Dividends Credited to Income							348
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					6,390	[15]	4,550
Gross Additions							1,290
Gross Reductions							0
Ending balance		$ 5,390	[17]	$ 5,840	$ 5,390	[17]	$ 5,840
Investment, Identifier [Axis]: SI East, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.75%		11.25%	11.75%		11.25%	11.25%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							6
Amount of Interest, Fees or Dividends Credited to Income							8
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 375		0
Gross Additions							625
Gross Reductions							0
Ending balance		$ 750		$ 625	$ 750		$ 625
Investment, Identifier [Axis]: SI East, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.63%	[53]	12.49%	12.63%	[53]	12.49%	12.47%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							170
Amount of Interest, Fees or Dividends Credited to Income							690
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 18,179		0
Gross Additions							18,179
Gross Reductions							0
Ending balance		$ 22,554	[53]	$ 18,179	22,554	[53]	18,179
Investment, Identifier [Axis]: SI East, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							(134)
Amount of Interest, Fees or Dividends Credited to Income							1,403
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							29,929
Gross Additions							0
Gross Reductions							29,929
Ending balance				0			0
Investment, Identifier [Axis]: SPAU Holdings, LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12]				160
Ending balance	[16]	$ 190			$ 190
Investment, Identifier [Axis]: SPAU Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[16],[18],[27]	12.46%			12.46%
Spread		7.50%	[16],[18],[27]		7.50%	[16],[18],[27]		8.00%	[12],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[13],[14]				$ 0
Ending balance	[16],[18],[27]	$ 780			$ 780
Investment, Identifier [Axis]: SPAU Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.45%	[16],[18]		12.45%	[16],[18]		13.72%	[12],[14]
Spread		7.50%	[16],[18]		7.50%	[16],[18]		8.00%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 4,925
Ending balance	[16],[18]	$ 4,888			4,888
Investment, Identifier [Axis]: Slick Innovations, LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					600
Ending balance	[17]	$ 540			$ 540
Investment, Identifier [Axis]: Slick Innovations, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		14.00%			14.00%			14.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 2,860
Ending balance		$ 4,200			4,200
Investment, Identifier [Axis]: South Coast Terminals Holdings, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12]				59
Ending balance	[16]	$ 59			$ 59
Investment, Identifier [Axis]: South Coast Terminals Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[12],[14]							11.46%
Spread		5.25%	[16],[18],[19]		5.25%	[16],[18],[19]		6.00%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 34
Ending balance	[16],[18],[19]	$ 0			$ 0
Investment, Identifier [Axis]: South Coast Terminals Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.20%	[16],[18]		10.20%	[16],[18]		11.70%	[12],[14]
Spread		5.25%	[16],[18]		5.25%	[16],[18]		6.00%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 2,979
Ending balance	[16],[18]	$ 4,355			4,355
Investment, Identifier [Axis]: Student Resource Center, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		139
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[12]	0
Gross Additions					0		139
Gross Reductions					0		0
Ending balance		$ 0	[16]	$ 139	0	[16]	$ 139
Investment, Identifier [Axis]: Student Resource Center, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				8.50%			8.50%	8.50%	[12],[24]
PIK Rate				8.50%			8.50%	8.50%	[12],[24]
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							(126)
Amount of Interest, Fees or Dividends Credited to Income							364
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 3,543	[12],[24]	5,063
Gross Additions							243
Gross Reductions							8
Ending balance				$ 5,298			5,298
Investment, Identifier [Axis]: Student Resource Center, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[16]	8.50%			8.50%
PIK Rate	[16]	8.50%			8.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16]	$ 223			$ 223
Investment, Identifier [Axis]: Student Resource Center, LLC, Secured Debt 1.1
Schedule of Investments [Line Items]
Total Rate		8.50%			8.50%
PIK Rate		8.50%			8.50%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(1,717)
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,543
Gross Additions					0
Gross Reductions					1,717
Ending balance		$ 1,826			$ 1,826
Investment, Identifier [Axis]: Student Resource Center, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[16],[23]	8.50%			8.50%
PIK Rate	[16],[23]	8.50%			8.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[23]	$ 1,826			$ 1,826
Investment, Identifier [Axis]: Student Resource Center, LLC, Secured Debt 2.1
Schedule of Investments [Line Items]
Total Rate		8.50%			8.50%
PIK Rate		8.50%			8.50%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					223
Gross Reductions					0
Ending balance		$ 223			223
Investment, Identifier [Axis]: Tedder Industries, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		(1,020)
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0		1,920
Gross Additions					0		0
Gross Reductions					0		1,020
Ending balance		0		900	0		900
Investment, Identifier [Axis]: Tedder Industries, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		44
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0		0
Gross Additions					0		150
Gross Reductions					0		0
Ending balance		0		150	0		150
Investment, Identifier [Axis]: Tedder Industries, LLC, Preferred Member Units 3
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		180
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0		0
Gross Additions					0		300
Gross Reductions					0		0
Ending balance		$ 0		$ 300	$ 0		$ 300
Investment, Identifier [Axis]: Tedder Industries, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.00%	[23],[26]	12.00%	12.00%	[23],[26]	12.00%	12.00%	[25]
PIK Rate	[23],[26]	12.00%			12.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		(14)
Amount of Interest, Fees or Dividends Credited to Income					14		42
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					432	[25]	460
Gross Additions					0		0
Gross Reductions					0		14
Ending balance		$ 432	[23],[26]	$ 446	$ 432	[23],[26]	$ 446
Investment, Identifier [Axis]: Tedder Industries, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.00%	[23],[26]	12.00%	12.00%	[23],[26]	12.00%	12.00%	[25]
PIK Rate	[23],[26]	12.00%			12.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(2,401)		(102)
Amount of Interest, Fees or Dividends Credited to Income					115		349
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,565	[25]	3,780
Gross Additions					0		3
Gross Reductions					2,401		102
Ending balance		$ 1,164	[23],[26]	$ 3,681	1,164	[23],[26]	3,681
Investment, Identifier [Axis]: Tex Tech Tennis, LLC, Preferred Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[28]				2,840
Ending balance	[16],[29]	2,410			2,410
Investment, Identifier [Axis]: The Affiliati Network, LLC, Preferred Stock 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					43
Ending balance	[17]	65			65
Investment, Identifier [Axis]: The Affiliati Network, LLC, Preferred Stock 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[15]				1,600
Ending balance	[17]	1,600			1,600
Investment, Identifier [Axis]: The Affiliati Network, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate								13.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					37
Ending balance	[19]	$ (2)			$ (2)
Investment, Identifier [Axis]: The Affiliati Network, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.00%			10.00%			13.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 1,841
Ending balance		$ 1,372			$ 1,372
Investment, Identifier [Axis]: Titan Meter Midco Corp., Preferred Equity
Schedule of Investments [Line Items]
Total Rate	[16]	8.00%			8.00%
PIK Rate	[16]	8.00%			8.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16]	$ 469			$ 469
Investment, Identifier [Axis]: Titan Meter Midco Corp., Secured Debt 1
Schedule of Investments [Line Items]
Spread	[16],[18],[19]	6.50%			6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18],[19]	$ (43)			$ (43)
Investment, Identifier [Axis]: Titan Meter Midco Corp., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[16],[18]	11.10%			11.10%
Spread	[16],[18]	6.50%			6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18]	$ 12,844			$ 12,844
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(800)		1,400
Amount of Interest, Fees or Dividends Credited to Income					22		22
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,180	[15]	1,950
Gross Additions					0		1,400
Gross Reductions					800		0
Ending balance		2,380	[17]	3,350	2,380	[17]	3,350
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		(2)
Amount of Interest, Fees or Dividends Credited to Income					1		3
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[13]	0
Gross Additions					0		2
Gross Reductions					0		2
Ending balance		$ 0	[19]	$ 0	$ 0	[19]	$ 0
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.50%		12.00%	13.50%		12.00%	12.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					15		(10)
Amount of Interest, Fees or Dividends Credited to Income					204		191
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,980		1,980
Gross Additions					0		10
Gross Reductions					0		10
Ending balance		$ 1,980		$ 1,980	$ 1,980		1,980
Investment, Identifier [Axis]: U.S. TelePacific Corp., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.50%	[9],[18],[23]		12.50%	[9],[18],[23]		12.53%	[8],[14],[24]
Spread		7.15%	[9],[18],[23]		7.15%	[9],[18],[23]		7.15%	[8],[14],[24]
PIK Rate		6.00%	[9],[18],[23]		6.00%	[9],[18],[23]		6.00%	[8],[14],[24]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[8],[14],[24]				$ 2,438
Ending balance	[9],[18],[23]	$ 2,702			2,702
Investment, Identifier [Axis]: U.S. TelePacific Corp., Secured Debt 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[8],[24]				0
Ending balance	[9],[23]	0			0
Investment, Identifier [Axis]: UPS Intermediate, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16]	$ 412			$ 412
Investment, Identifier [Axis]: UPS Intermediate, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[16],[18]	11.51%			11.51%
Spread	[16],[18]	6.25%			6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18]	$ 19,147			$ 19,147
Investment, Identifier [Axis]: USA DeBusk LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[12],[14]							11.46%
Spread	[12],[14]							6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				12,405
Investment, Identifier [Axis]: USA DeBusk LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[12],[14]							11.96%
Spread	[12],[14]							6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				4,825
Investment, Identifier [Axis]: USA DeBusk LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[12],[14]							11.96%
Spread	[12],[14]							6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 2,515
Investment, Identifier [Axis]: Urgent DSO LLC, Preferred Equity
Schedule of Investments [Line Items]
Total Rate	[17]	9.00%			9.00%
PIK Rate	[17]	9.00%			9.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[17]	$ 1,057			$ 1,057
Investment, Identifier [Axis]: Urgent DSO LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.50%			13.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 2,142			$ 2,142
Investment, Identifier [Axis]: UserZoom Technologies, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate		12.75%	[16],[18]		12.75%	[16],[18]		12.99%	[12],[14]
Spread		7.50%	[16],[18]		7.50%	[16],[18]		7.50%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 3,000
Ending balance	[16],[18]	$ 3,000			3,000
Investment, Identifier [Axis]: VORTEQ Coil Finishers, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[15]				1,911
Ending balance	[16],[17]	1,910			1,910
Investment, Identifier [Axis]: VVS Holdco LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		(30)
Amount of Interest, Fees or Dividends Credited to Income					80		54
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,060	[15],[28]	2,990
Gross Additions					0		0
Gross Reductions					0		30
Ending balance		$ 3,060	[17],[29]	$ 2,960	$ 3,060	[17],[29]	$ 2,960
Investment, Identifier [Axis]: VVS Holdco LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6.00%	[18],[19]	6.00%	6.00%	[18],[19]	6.00%	6.00%	[13],[14],[25]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					3		6
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[13],[14],[25]	(5)
Gross Additions					0		4
Gross Reductions					0		0
Ending balance		$ 0	[18],[19]	$ (1)	$ 0	[18],[19]	$ (1)
Investment, Identifier [Axis]: VVS Holdco LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.50%		11.50%	11.50%		11.50%	11.50%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					638		686
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					6,926		7,421
Gross Additions					36		45
Gross Reductions					290		551
Ending balance		$ 6,672		$ 6,915	6,672		6,915
Investment, Identifier [Axis]: Vistar Media, Inc., Preferred Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12]				2,180
Ending balance	[16]	$ 3,180			3,180
Investment, Identifier [Axis]: Vitesse Systems, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[12],[14]							12.63%
Spread	[12],[14]							7.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 12,193
Investment, Identifier [Axis]: Vitesse Systems, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[16],[18],[54]	12.47%			12.47%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18],[54]	$ 1,705			$ 1,705
Investment, Identifier [Axis]: Vitesse Systems, Secured Debt 1, Prime
Schedule of Investments [Line Items]
Spread		6.00%			6.00%
Investment, Identifier [Axis]: Vitesse Systems, Secured Debt 1, Secured Overnight Financing Rate
Schedule of Investments [Line Items]
Spread		7.00%			7.00%
Investment, Identifier [Axis]: Vitesse Systems, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[16],[18]	11.96%			11.96%
Spread	[16],[18]	7.00%			7.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18]	$ 12,406			$ 12,406
Investment, Identifier [Axis]: Volusion, LLC, Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		(1,104)
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0		0
Gross Additions					0		1,104
Gross Reductions					0		1,104
Ending balance		0		0	0		0
Investment, Identifier [Axis]: Volusion, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,110		0
Gross Additions							0
Gross Reductions							0
Ending balance		3,200		0	3,200		0
Investment, Identifier [Axis]: Volusion, LLC, Preferred Member Units 1.1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					0
Gross Reductions					0
Ending balance		0			0
Investment, Identifier [Axis]: Volusion, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							(596)
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0		0
Gross Additions							4,906
Gross Reductions							896
Ending balance		0		4,010	0		4,010
Investment, Identifier [Axis]: Volusion, LLC, Preferred Member Units 2.1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					1,895
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,110
Gross Additions					1,895
Gross Reductions					1,805
Ending balance		3,200			3,200
Investment, Identifier [Axis]: Volusion, LLC, Preferred Member Units 3
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0		0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 0		$ 0	$ 0		$ 0
Investment, Identifier [Axis]: Volusion, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.00%			10.00%			10.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					69
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					900
Gross Additions					0
Gross Reductions					0
Ending balance		$ 900			900
Investment, Identifier [Axis]: Volusion, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate				10.00%			10.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							46
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							0
Gross Additions							900
Gross Reductions							0
Ending balance				$ 900			900
Investment, Identifier [Axis]: Volusion, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							(1,366)
Amount of Unrealized Gain/(Loss)							780
Amount of Interest, Fees or Dividends Credited to Income							71
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							6,392
Gross Additions							0
Gross Reductions							6,392
Ending balance				0			0
Investment, Identifier [Axis]: Volusion, LLC, Unsecured Convertible Debt
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							(175)
Amount of Unrealized Gain/(Loss)							175
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							0
Gross Additions							175
Gross Reductions							175
Ending balance				0			0
Investment, Identifier [Axis]: Volusion, LLC, Warrants
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							1,104
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							0
Gross Additions							0
Gross Reductions							0
Ending balance				$ 0			$ 0
Investment, Identifier [Axis]: Wall Street Prep, Inc., Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12]				910
Ending balance	[16]	$ 1,160			$ 1,160
Investment, Identifier [Axis]: Wall Street Prep, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Spread		7.00%	[16],[18],[19]		7.00%	[16],[18],[19]		7.00%	[12],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[13],[14]				$ (5)
Ending balance	[16],[18],[19]	$ (4)			$ (4)
Investment, Identifier [Axis]: Wall Street Prep, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.48%	[16],[18]		12.48%	[16],[18]		12.54%	[12],[14]
Spread		7.00%	[16],[18]		7.00%	[16],[18]		7.00%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 4,654
Ending balance	[16],[18]	$ 3,733			$ 3,733
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.00%	[16]		12.00%	[16]		11.50%	[12],[14],[47]
Spread	[12],[14],[47]							6.00%
PIK Rate	[16]	4.00%			4.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14],[47]				$ 253
Ending balance	[16]	$ 290			$ 290
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.00%	[16]		12.00%	[16]		11.50%	[12],[14]
Spread	[12],[14]							6.00%
PIK Rate	[16]	4.00%			4.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 53
Ending balance	[16]	$ 50			$ 50
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12.00%	[16]		12.00%	[16]		11.50%	[12],[14]
Spread	[12],[14]							6.00%
PIK Rate	[16]	4.00%			4.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 2,166
Ending balance	[16]	$ 2,059			$ 2,059
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate		12.00%	[16]		12.00%	[16]		11.50%	[12],[14]
Spread	[12],[14]							6.00%
PIK Rate	[16]	4.00%			4.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 1,955
Ending balance	[16]	$ 1,858			1,858
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12]				390
Ending balance	[16],[17]	$ 590			$ 590
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		9.60%	[16],[18],[48]		9.60%	[16],[18],[48]		11.34%	[12],[14],[55]
Spread		5.00%	[16],[18],[48]		5.00%	[16],[18],[48]		6.00%	[12],[14],[55]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14],[55]				$ 665
Ending balance	[16],[18],[48]	$ 662			$ 662
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		9.60%	[16],[18]		9.60%	[16],[18]		11.35%	[12],[14]
Spread		5.00%	[16],[18]		5.00%	[16],[18]		6.00%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 2,947
Ending balance	[16],[18]	$ 2,925			$ 2,925
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		9.60%	[16],[18]		9.60%	[16],[18]		11.35%	[12],[14]
Spread		5.00%	[16],[18]		5.00%	[16],[18]		6.00%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 1,467
Ending balance	[16],[18]	$ 1,456			$ 1,456
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.59%	[16],[18]		13.59%	[16],[18]		12.64%	[12],[14],[56]
Spread		8.00%	[16],[18]		8.00%	[16],[18]		7.00%	[12],[14],[56]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14],[56]				$ 2,778
Ending balance	[16],[18]	$ 800			$ 800
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.59%	[16],[18]		13.59%	[16],[18]		12.66%	[12],[14]
Spread		8.00%	[16],[18]		8.00%	[16],[18]		7.00%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 2,583
Ending balance	[16],[18]	$ 2,248			$ 2,248
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12.59%	[16],[18]		12.59%	[16],[18]		12.66%	[12],[14]
Spread		7.00%	[16],[18]		7.00%	[16],[18]		7.00%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 11,625
Ending balance	[16],[18]	$ 8,684			$ 8,684
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate	[16],[18]	14.59%			14.59%
Spread	[16],[18]	9.00%			9.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18]	$ 8,684			$ 8,684
Investment, Identifier [Axis]: World Micro Holdings, LLC, Preferred Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[15]				530
Ending balance	[17]	$ 530			$ 530
Investment, Identifier [Axis]: World Micro Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.00%			13.00%			13.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 1,601
Ending balance		$ 1,586			$ 1,586
Investment, Identifier [Axis]: Xenon Arc, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[16],[18]	10.16%			10.16%
Spread		5.25%	[16],[18]		5.25%	[16],[18]		5.25%	[12],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[13],[14]				$ 0
Ending balance	[16],[18]	$ 1,179			$ 1,179
Investment, Identifier [Axis]: Xenon Arc, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.63%	[16],[18]		10.63%	[16],[18]		11.22%	[12],[14]
Spread		5.25%	[16],[18]		5.25%	[16],[18]		5.75%	[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 1,188
Ending balance	[16],[18]	$ 2,334			2,334
Investment, Identifier [Axis]: Xenon Arc, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[12],[14]							11.25%
Spread	[12],[14]							5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14]				$ 2,352
Investment, Identifier [Axis]: YS Garments, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12.89%	[9],[18]		12.89%	[9],[18]		13.00%	[8],[14]
Spread		7.50%	[9],[18]		7.50%	[9],[18]		7.50%	[8],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[8],[14]				$ 5,110
Ending balance	[9],[18]	$ 4,699			$ 4,699
Investment, Identifier [Axis]: ZRG Partners, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread	[16],[18],[19]	6.00%			6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18],[19]	$ (29)			$ (29)
Investment, Identifier [Axis]: ZRG Partners, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Spread	[16],[18]	6.00%			6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18]	$ 613			$ 613
Investment, Identifier [Axis]: ZRG Partners, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[16],[18]	11.26%			11.26%
Spread	[16],[18]	6.00%			6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18]	$ 969			$ 969
Investment, Identifier [Axis]: ZRG Partners, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate	[16],[18]	11.30%			11.30%
Spread	[16],[18]	6.00%			6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[16],[18]	$ 6,944			$ 6,944
Investment, Identifier [Axis]: Zips Car Wash, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.46%	[16],[18],[48]		12.46%	[16],[18],[48]		12.71%	[12],[14],[57]
Spread		7.25%	[16],[18],[48]		7.25%	[16],[18],[48]		7.25%	[12],[14],[57]
PIK Rate	[16],[18],[48]	1.50%			1.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14],[57]				$ 2,234
Ending balance	[16],[18],[48]	$ 2,219			$ 2,219
Investment, Identifier [Axis]: Zips Car Wash, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.46%	[16],[18],[48]		12.46%	[16],[18],[48]		12.71%	[12],[14],[57]
Spread		7.25%	[16],[18],[48]		7.25%	[16],[18],[48]		7.25%	[12],[14],[57]
PIK Rate	[16],[18],[48]	1.50%			1.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[12],[14],[57]				$ 555
Ending balance	[16],[18],[48]	$ 555			$ 555
[1] Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C — Fair Value Hierarchy for Investments—Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par. [2] Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par. [3] Control investments are defined by the 1940 Act as investments in which more than 25% of the voting securities are owned or where the ability to nominate greater than 50% of the board representation is maintained. [4] Control investments are defined by the 1940 Act as investments in which more than 25% of the voting securities are owned or where the ability to nominate greater than 50% of the board representation is maintained. [5] Affiliate investments are defined by the 1940 Act as investments in which between 5% and 25% (inclusive) of the voting securities are owned and the investments are not classified as Control investments. [6] Affiliate investments are defined by the 1940 Act as investments in which between 5% and 25% (inclusive) of the voting securities are owned and the investments are not classified as Control investments. [7] Effective yield as of September 30, 2024 was approximately 4.58% on the Fidelity Government Portfolio Fund Class III. [8] Middle Market portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Middle Market portfolio investments. [9] Middle Market portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Middle Market portfolio investments. [10] Warrants are presented in equivalent shares/units with a strike price of $0.01 per share/unit. [11] Warrants are presented in equivalent shares/units with a strike price of $0.01 per share/unit. [12] Private Loan portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Private Loan portfolio investments. [13] The position is unfunded and no interest income is being earned as of December 31, 2023. The position may earn a nominal unused facility fee on committed amounts. [14] Index based floating interest rate is subject to contractual minimum interest rate. As noted in this schedule, 95% of these floating rate loans (based on the par amount) contain LIBOR or SOFR floors which range between 0.75% and 2.00%, with a weighted-average floor of 1.17%. [15] Income producing through dividends or distributions. [16] Private Loan portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Private Loan portfolio investments. [17] Income producing through dividends or distributions. [18] Index based floating interest rate is subject to contractual minimum interest rate. As noted in this schedule, 96% of the loans (based on the par amount) contain Term SOFR (“SOFR”) floors which range between 0.75% and 5.25%, with a weighted-average floor of 1.25%. [19] The position is unfunded and no interest income is being earned as of September 30, 2024. The position may earn a nominal unused facility fee on committed amounts. [20] Warrants are presented in equivalent shares/units with a strike price of $1.00 per share/unit. [21] Index based floating interest rate is subject to contractual maximum base rate of 3.00%. [22] Index based floating interest rate is subject to contractual maximum base rate of 3.00%. [23] Non-accrual and non-income producing debt investment. [24] Non-accrual and non-income producing debt investment. [25] Maturity date is under on-going negotiations with the portfolio company and other lenders, if applicable. [26] Maturity date is under on-going negotiations with the portfolio company and other lenders, if applicable. [27] RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of September 30, 2024. [28] Shares/Units represent ownership in a related Real Estate or HoldCo entity. [29] Shares/Units represent ownership in a related Real Estate or HoldCo entity. [30] Investment is not a qualifying asset as defined under Section 55(a) of the 1940 Act. Qualifying assets must represent at least 70% of total assets at the time of acquisition of any additional non-qualifying assets. [31] Portfolio company headquarters are located outside of the United States. [32] Investment is not a qualifying asset as defined under Section 55(a) of the 1940 Act. Qualifying assets must represent at least 70% of total assets at the time of acquisition of any additional non-qualifying assets. [33] Portfolio company headquarters are located outside of the United States. [34] Investment is not unitized. Presentation is made in percent of fully diluted ownership unless otherwise indicated. [35] Other Portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Other Portfolio investments. [36] Investment is not unitized. Presentation is made in percent of fully diluted ownership unless otherwise indicated. [37] Other Portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Other Portfolio investments. [38] As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+7.00% (Floor 2.00%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2023. [39] As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+8.00% (Floor 1.00%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2023. [40] Effective yield as of December 31, 2023 was approximately 5.25% on the Fidelity Government Portfolio Class III Fund. [41] Effective yield as of December 31, 2023 was approximately 5.23% on the First American Treasury Obligations Fund Class Z. [42] Effective yield as of September 30, 2024 was approximately 4.97% on the First American Treasury Obligations Fund Class Z. [43] As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+7.00% (Floor 1.50%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2023. [44] As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+6.75% (Floor 1.00%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2023. [45] As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+8.00% (Floor 2.00%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2023. [46] As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+10.00%. RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2023. [47] As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+6.00% (Floor 1.00%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2023. [48] Each new draw or funding on the facility has a different floating rate reset date. The rate presented represents a weighted-average rate for borrowings under the facility, as of September 30, 2024. [49] As of December 31, 2023, borrowings under the loan facility bear interest at SOFR+7.00% (Floor 1.00%). Each new draw or funding on the facility has a different floating rate reset date. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2023. [50] As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+7.25% (Floor 1.00%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2023. [51] As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+5.75% (Floor 1.00%). Each new draw or funding on the facility has a different floating rate reset date. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2023. [52] As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+6.50% (Floor 2.00%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2023. [53] The Company has entered into an intercreditor agreement that entitles the Company to the “last out” tranche of the first lien secured loans, whereby the “first out” tranche will receive priority as to the “last out” tranche with respect to payments of principal, interest, and any other amounts due thereunder. Therefore, the Company receives a higher interest rate than the contractual stated interest rate of 11.75% per the credit agreement and the Consolidated Schedule of Investments above reflects such higher rate. [54] RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. As of September 30, 2024, the facility had contracts running under the terms SF+7.00% (Floor 1.00%) and P+6.00% (Floor 2.00%). The rate presented represents a weighted-average rate for borrowings under the facility, as of September 30, 2024. [55] As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+6.00% (Floor 0.75%). Each new draw or funding on the facility has a different floating rate reset date. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2023. [56] As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+7.00% (Floor 1.00%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2023. [57] As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+7.25% (Floor 1.00%). Each new draw or funding on the facility has a different floating rate reset date. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2023.