Schedule of Investments in and Advances to Affiliates (Details) - USD ($) $ in Thousands		12 Months Ended
		Mar. 31, 2023		Mar. 31, 2022
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		$ 162,930
Amount of Interest or Dividends Credited in Income		22,196
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		189,482
Gross Additions		104,035
Gross Reductions		(37,998)
Amount of Realized Gain/(Loss)		(10,625)
Amount of Unrealized Gain/(Loss)		(5,133)
Fair Value, ending balance		239,761
Control investments
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		0
Amount of Interest or Dividends Credited in Income		7,337
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		57,603
Gross Additions		4,800
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		(11,147)
Fair Value, ending balance		51,256
Affiliate investments
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		162,930
Amount of Interest or Dividends Credited in Income		14,859
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		131,879
Gross Additions		99,235
Gross Reductions		(37,998)
Amount of Realized Gain/(Loss)		(10,625)
Amount of Unrealized Gain/(Loss)		6,014
Fair Value, ending balance		188,505
Investment, Identifier [Axis]: AIR CONDITIONING SPECIALIST, INC., First Lien
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		27,438
Amount of Interest or Dividends Credited in Income		1,905
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		12,535
Gross Additions		14,574
Gross Reductions		(170)
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		499
Fair Value, ending balance		$ 27,438
Investment, Identifier [Axis]: AIR CONDITIONING SPECIALIST, INC., Preferred Units
Schedule of Investments [Line Items]
Shares (in shares)		766,738.93
Principal Amount - Debt Investments		$ 0
Amount of Interest or Dividends Credited in Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		634
Gross Additions		186
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		382
Fair Value, ending balance		1,202
Investment, Identifier [Axis]: AIR CONDITIONING SPECIALIST, INC., Revolving Loan
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		800
Amount of Interest or Dividends Credited in Income		15
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0
Gross Additions		1,384
Gross Reductions		(600)
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		16
Fair Value, ending balance		$ 800
Investment, Identifier [Axis]: ALLIANCE SPORTS GROUP, L.P., Membership preferred interest
Schedule of Investments [Line Items]
Ownership percent	[1]	3.88%
Investment, Identifier [Axis]: ALLIANCE SPORTS GROUP, L.P., Preferred membership interest
Schedule of Investments [Line Items]
Ownership percent	[2]			3.88%
Investment, Identifier [Axis]: CATBIRD NYC, LLC, Class A Units
Schedule of Investments [Line Items]
Shares (in shares)		1,000,000
Principal Amount - Debt Investments		$ 0
Amount of Interest or Dividends Credited in Income		88
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		1,221
Gross Additions		0
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		437
Fair Value, ending balance		$ 1,658
Investment, Identifier [Axis]: CATBIRD NYC, LLC, Class B Units
Schedule of Investments [Line Items]
Shares (in shares)		500,000
Principal Amount - Debt Investments		$ 0
Amount of Interest or Dividends Credited in Income		53
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		572
Gross Additions		0
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		142
Fair Value, ending balance		714
Investment, Identifier [Axis]: CATBIRD NYC, LLC, First Lien
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		15,500
Amount of Interest or Dividends Credited in Income		1,635
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		15,884
Gross Additions		59
Gross Reductions		(400)
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		(43)
Fair Value, ending balance		15,500
Investment, Identifier [Axis]: CATBIRD NYC, LLC. Revolving Loan
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		0
Amount of Interest or Dividends Credited in Income		36
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0
Gross Additions		16
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		(16)
Fair Value, ending balance		0
Investment, Identifier [Axis]: CENTRAL MEDICAL SUPPLY LLC, Delayed Draw Term Loan
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		100
Amount of Interest or Dividends Credited in Income		25
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		97
Gross Additions		6
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		(4)
Fair Value, ending balance		99
Investment, Identifier [Axis]: CENTRAL MEDICAL SUPPLY LLC, First Lien
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		7,500
Amount of Interest or Dividends Credited in Income		950
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		7,260
Gross Additions		29
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		113
Fair Value, ending balance		$ 7,402
Investment, Identifier [Axis]: CENTRAL MEDICAL SUPPLY LLC, Preferred Units
Schedule of Investments [Line Items]
Shares (in shares)		1,380,500
Principal Amount - Debt Investments		$ 0
Amount of Interest or Dividends Credited in Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		641
Gross Additions		0
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		(284)
Fair Value, ending balance		357
Investment, Identifier [Axis]: CENTRAL MEDICAL SUPPLY LLC, Revolving Loan
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		300
Amount of Interest or Dividends Credited in Income		49
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		290
Gross Additions		6
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Fair Value, ending balance		$ 296
Investment, Identifier [Axis]: CHANDLER SIGNS, LLC, Units of Class A-1 common stock
Schedule of Investments [Line Items]
Shares (in shares)		1,500,000
Principal Amount - Debt Investments		$ 0
Amount of Interest or Dividends Credited in Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		924
Gross Additions		0
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		2,291
Fair Value, ending balance		$ 3,215
Investment, Identifier [Axis]: DELPHI BEHAVIORAL HEALTH GROUP, LLC, Common Units
Schedule of Investments [Line Items]
Shares (in shares)		1,681.04
Principal Amount - Debt Investments		$ 0
Amount of Interest or Dividends Credited in Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		2,460
Gross Additions		0
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		(2,460)
Fair Value, ending balance		0
Investment, Identifier [Axis]: DELPHI BEHAVIORAL HEALTH GROUP, LLC, First Lien A
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		1,649
Amount of Interest or Dividends Credited in Income		108
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		1,402
Gross Additions		108
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		(1,510)
Fair Value, ending balance		0
Investment, Identifier [Axis]: DELPHI BEHAVIORAL HEALTH GROUP, LLC, First Lien B
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		1,829
Amount of Interest or Dividends Credited in Income		98
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		1,472
Gross Additions		97
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		(1,569)
Fair Value, ending balance		0
Investment, Identifier [Axis]: DELPHI BEHAVIORAL HEALTH GROUP, LLC, Protective Advance
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		1,448
Amount of Interest or Dividends Credited in Income		79
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		526
Gross Additions		922
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		(1,448)
Fair Value, ending balance		0
Investment, Identifier [Axis]: DYNAMIC COMMUNITIES, LLC, First Lien
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		0
Amount of Interest or Dividends Credited in Income		286
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		10,323
Gross Additions		12
Gross Reductions		(11,159)
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		824
Fair Value, ending balance		0
Investment, Identifier [Axis]: DYNAMIC COMMUNITIES, LLC, First Lien - Term Loan A
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		3,846
Amount of Interest or Dividends Credited in Income		249
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0
Gross Additions		9,554
Gross Reductions		(4,604)
Amount of Realized Gain/(Loss)		(1,124)
Amount of Unrealized Gain/(Loss)		(3)
Fair Value, ending balance		3,823
Investment, Identifier [Axis]: DYNAMIC COMMUNITIES, LLC, First Lien - Term Loan B
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		3,867
Amount of Interest or Dividends Credited in Income		118
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0
Gross Additions		9,423
Gross Reductions		(4,484)
Amount of Realized Gain/(Loss)		(1,095)
Amount of Unrealized Gain/(Loss)		(1)
Fair Value, ending balance		$ 3,843
Investment, Identifier [Axis]: DYNAMIC COMMUNITIES, LLC, Preferred units
Schedule of Investments [Line Items]
Shares (in shares)		2,000,000
Principal Amount - Debt Investments		$ 0
Amount of Interest or Dividends Credited in Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		1,274
Gross Additions		0
Gross Reductions		0
Amount of Realized Gain/(Loss)		(2,000)
Amount of Unrealized Gain/(Loss)		726
Fair Value, ending balance		0
Investment, Identifier [Axis]: DYNAMIC COMMUNITIES, LLC, Revolving Loan
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		0
Amount of Interest or Dividends Credited in Income		1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0
Gross Additions		0
Gross Reductions		0
Amount of Realized Gain/(Loss)		1
Amount of Unrealized Gain/(Loss)		(1)
Fair Value, ending balance		0
Investment, Identifier [Axis]: DYNAMIC COMMUNITIES, LLC, Senior subordinated debt
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		0
Amount of Interest or Dividends Credited in Income		41
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		650
Gross Additions		41
Gross Reductions		(587)
Amount of Realized Gain/(Loss)		(104)
Amount of Unrealized Gain/(Loss)		0
Fair Value, ending balance		$ 0
Investment, Identifier [Axis]: Dynamic Communities, LLC, Class A Preferred units
Schedule of Investments [Line Items]
Shares (in shares)		250,000
Principal Amount - Debt Investments		$ 0
Amount of Interest or Dividends Credited in Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0
Gross Additions		250
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		375
Fair Value, ending balance		$ 625
Investment, Identifier [Axis]: Dynamic Communities, LLC, Class B Preferred units
Schedule of Investments [Line Items]
Shares (in shares)		5,435,211.03
Principal Amount - Debt Investments		$ 0
Amount of Interest or Dividends Credited in Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0
Gross Additions		2,218
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Fair Value, ending balance		$ 2,218
Investment, Identifier [Axis]: Dynamic Communities, LLC, Class C Preferred units
Schedule of Investments [Line Items]
Shares (in shares)		255,984.22
Principal Amount - Debt Investments		$ 0
Amount of Interest or Dividends Credited in Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0
Gross Additions		0
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Fair Value, ending balance		$ 0
Investment, Identifier [Axis]: Dynamic Communities, LLC, Common units
Schedule of Investments [Line Items]
Shares (in shares)		2,500,000
Principal Amount - Debt Investments		$ 0
Amount of Interest or Dividends Credited in Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0
Gross Additions		0
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Fair Value, ending balance		$ 0
Investment, Identifier [Axis]: GPT Industries, LLC Class A Preferred Units
Schedule of Investments [Line Items]
Shares (in shares)		1,000,000
Principal Amount - Debt Investments		$ 0
Amount of Interest or Dividends Credited in Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0
Gross Additions		1,000
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Fair Value, ending balance		1,000
Investment, Identifier [Axis]: GPT Industries, LLC First Lien
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		6,150
Amount of Interest or Dividends Credited in Income		148
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0
Gross Additions		6,030
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Fair Value, ending balance		6,030
Investment, Identifier [Axis]: GPT Industries, LLC Revolving Loan
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		0
Amount of Interest or Dividends Credited in Income		5
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0
Gross Additions		(58)
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		58
Fair Value, ending balance		$ 0
Investment, Identifier [Axis]: GRAMMATECH, INC., Class A units
Schedule of Investments [Line Items]
Shares (in shares)		1,000
Principal Amount - Debt Investments		$ 0
Amount of Interest or Dividends Credited in Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		674
Gross Additions		0
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		(674)
Fair Value, ending balance		$ 0
Investment, Identifier [Axis]: GRAMMATECH, INC., Class A-1 units
Schedule of Investments [Line Items]
Shares (in shares)		360.06
Principal Amount - Debt Investments		$ 0
Amount of Interest or Dividends Credited in Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		38
Gross Additions		304
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		30
Fair Value, ending balance		372
Investment, Identifier [Axis]: GRAMMATECH, INC., First Lien
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		10,031
Amount of Interest or Dividends Credited in Income		1,336
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		9,775
Gross Additions		67
Gross Reductions		(1,500)
Amount of Realized Gain/(Loss)		15
Amount of Unrealized Gain/(Loss)		1,674
Fair Value, ending balance		10,031
Investment, Identifier [Axis]: GRAMMATECH, INC., Revolving Loan
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		0
Amount of Interest or Dividends Credited in Income		10
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0
Gross Additions		9
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		(9)
Fair Value, ending balance		$ 0
Investment, Identifier [Axis]: I-45 SLF LLC
Schedule of Investments [Line Items]
Ownership percent	[1],[3],[4],[5]	80.00%
Investment, Identifier [Axis]: I-45 SLF LLC, LLC equity interest
Schedule of Investments [Line Items]
Ownership percent		80.00%		80.00%	[2],[6],[7],[8]
Principal Amount - Debt Investments		$ 0
Amount of Interest or Dividends Credited in Income		7,337
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		57,603
Gross Additions		4,800
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		(11,147)
Fair Value, ending balance		$ 51,256
Investment, Identifier [Axis]: INFOLINKS MEDIA BUYCO, LLC, LP interest
Schedule of Investments [Line Items]
Ownership percent		1.68%	[1],[4],[5],[9]	1.68%	[2],[7],[8],[10]
Investment, Identifier [Axis]: ITA HOLDINGS GROUP, LLC, Class A Membership Interest
Schedule of Investments [Line Items]
Ownership percent		9.25%	[1],[4],[9]	9.25%	[2],[6],[7],[10]
Investment, Identifier [Axis]: ITA HOLDINGS GROUP, LLC, Class A membership interest
Schedule of Investments [Line Items]
Ownership percent		9.25%
Principal Amount - Debt Investments		$ 0
Amount of Interest or Dividends Credited in Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		3,063
Gross Additions		0
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		1,285
Fair Value, ending balance		4,348
Investment, Identifier [Axis]: ITA HOLDINGS GROUP, LLC, First Lien - PIK Note A
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		3,271
Amount of Interest or Dividends Credited in Income		545
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		2,959
Gross Additions		538
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		(242)
Fair Value, ending balance		3,255
Investment, Identifier [Axis]: ITA HOLDINGS GROUP, LLC, First Lien - PIK Note B
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		129
Amount of Interest or Dividends Credited in Income		13
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		117
Gross Additions		12
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		(1)
Fair Value, ending balance		128
Investment, Identifier [Axis]: ITA HOLDINGS GROUP, LLC, First Lien - Term Loan
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		10,114
Amount of Interest or Dividends Credited in Income		1,232
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		10,041
Gross Additions		98
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		(25)
Fair Value, ending balance		10,114
Investment, Identifier [Axis]: ITA HOLDINGS GROUP, LLC, First Lien - Term Loan B
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		5,057
Amount of Interest or Dividends Credited in Income		766
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		5,061
Gross Additions		47
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		(40)
Fair Value, ending balance		5,068
Investment, Identifier [Axis]: ITA HOLDINGS GROUP, LLC, Revolving loan
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		7,000
Amount of Interest or Dividends Credited in Income		786
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		750
Gross Additions		6,241
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		23
Fair Value, ending balance		7,014
Investment, Identifier [Axis]: ITA HOLDINGS GROUP, LLC, Warrants
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		0
Amount of Interest or Dividends Credited in Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		3,199
Gross Additions		0
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		847
Fair Value, ending balance		$ 4,046
Investment, Identifier [Axis]: LIGHTING RETROFIT INTERNATIONAL, LLC (DBA ENVOCORE), Common units
Schedule of Investments [Line Items]
Shares (in shares)		203,124.9999
Principal Amount - Debt Investments		$ 0
Amount of Interest or Dividends Credited in Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0
Gross Additions		0
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Fair Value, ending balance		0
Investment, Identifier [Axis]: LIGHTING RETROFIT INTERNATIONAL, LLC (DBA ENVOCORE), First Lien
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		5,143
Amount of Interest or Dividends Credited in Income		393
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		4,780
Gross Additions		0
Gross Reductions		(53)
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		416
Fair Value, ending balance		5,143
Investment, Identifier [Axis]: LIGHTING RETROFIT INTERNATIONAL, LLC (DBA ENVOCORE), Revolving Loan
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		0
Amount of Interest or Dividends Credited in Income		34
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0
Gross Additions		833
Gross Reductions		(833)
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Fair Value, ending balance		0
Investment, Identifier [Axis]: LIGHTING RETROFIT INTERNATIONAL, LLC (DBA ENVOCORE), Second Lien
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		5,208
Amount of Interest or Dividends Credited in Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		3,104
Gross Additions		0
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		490
Fair Value, ending balance		$ 3,594
Investment, Identifier [Axis]: LIGHTING RETROFIT INTERNATIONAL, LLC (DBA ENVOCORE), Series A Preferred units
Schedule of Investments [Line Items]
Shares (in shares)		208,333.3333
Principal Amount - Debt Investments		$ 0
Amount of Interest or Dividends Credited in Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0
Gross Additions		0
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Fair Value, ending balance		$ 0
Investment, Identifier [Axis]: LIGHTNING INTERMEDIATE II, LLC (DBA VIMERGY), LLC interest
Schedule of Investments [Line Items]
Ownership percent	[1],[4],[9]	0.88%
Investment, Identifier [Axis]: OUTERBOX, LLC, Class A common units
Schedule of Investments [Line Items]
Shares (in shares)		6,308.2584
Principal Amount - Debt Investments		$ 0
Amount of Interest or Dividends Credited in Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0
Gross Additions		631
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		142
Fair Value, ending balance		773
Investment, Identifier [Axis]: OUTERBOX, LLC, First Lien
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		14,625
Amount of Interest or Dividends Credited in Income		982
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0
Gross Additions		14,429
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		123
Fair Value, ending balance		14,552
Investment, Identifier [Axis]: OUTERBOX, LLC, Revolving Loan
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		0
Amount of Interest or Dividends Credited in Income		9
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0
Gross Additions		(25)
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		25
Fair Value, ending balance		$ 0
Investment, Identifier [Axis]: ROSELAND MANAGEMENT, LLC, Class A Units
Schedule of Investments [Line Items]
Shares (in shares)		16,084
Principal Amount - Debt Investments		$ 0
Amount of Interest or Dividends Credited in Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		1,905
Gross Additions		0
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		(1,483)
Fair Value, ending balance		422
Investment, Identifier [Axis]: ROSELAND MANAGEMENT, LLC, Class A-2 Units
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		0
Amount of Interest or Dividends Credited in Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0
Gross Additions		202
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		492
Fair Value, ending balance		694
Investment, Identifier [Axis]: ROSELAND MANAGEMENT, LLC, First Lien
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		15,051
Amount of Interest or Dividends Credited in Income		1,883
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		14,125
Gross Additions		1,132
Gross Reductions		(145)
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		(588)
Fair Value, ending balance		14,524
Investment, Identifier [Axis]: ROSELAND MANAGEMENT, LLC, Revolving Loan
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		575
Amount of Interest or Dividends Credited in Income		81
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		575
Gross Additions		2
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		(22)
Fair Value, ending balance		$ 555
Investment, Identifier [Axis]: Roseland Management, LLC, Class A-1 Units
Schedule of Investments [Line Items]
Shares (in shares)		1,100
Principal Amount - Debt Investments		$ 0
Amount of Interest or Dividends Credited in Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0
Gross Additions		66
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		95
Fair Value, ending balance		$ 161
Investment, Identifier [Axis]: Roseland Management, LLC, Class A-2 units
Schedule of Investments [Line Items]
Shares (in shares)		3,364
Investment, Identifier [Axis]: SIMR, LLC, Class B Common Units
Schedule of Investments [Line Items]
Shares (in shares)		9,374,510.2
Principal Amount - Debt Investments		$ 0
Amount of Interest or Dividends Credited in Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0
Gross Additions		0
Gross Reductions		0
Amount of Realized Gain/(Loss)		(6,107)
Amount of Unrealized Gain/(Loss)		6,107
Fair Value, ending balance		$ 0
Investment, Identifier [Axis]: SIMR, LLC, Class W Units
Schedule of Investments [Line Items]
Shares (in shares)		904,903.31
Principal Amount - Debt Investments		$ 0
Amount of Interest or Dividends Credited in Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0
Gross Additions		0
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Fair Value, ending balance		0
Investment, Identifier [Axis]: SIMR, LLC, First Lien
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		0
Amount of Interest or Dividends Credited in Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		10,588
Gross Additions		191
Gross Reductions		(13,081)
Amount of Realized Gain/(Loss)		(211)
Amount of Unrealized Gain/(Loss)		2,513
Fair Value, ending balance		0
Investment, Identifier [Axis]: SIMR, LLC, First Lien - Incremental
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		0
Amount of Interest or Dividends Credited in Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0
Gross Additions		191
Gross Reductions		(191)
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Fair Value, ending balance		$ 0
Investment, Identifier [Axis]: STATINMED, LLC, Class A Preferred Units
Schedule of Investments [Line Items]
Shares (in shares)		4,718.62
Principal Amount - Debt Investments		$ 0
Amount of Interest or Dividends Credited in Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0
Gross Additions		4,838
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		(1,071)
Fair Value, ending balance		$ 3,767
Investment, Identifier [Axis]: STATINMED, LLC, Class B Preferred Units
Schedule of Investments [Line Items]
Shares (in shares)		39,097.96
Principal Amount - Debt Investments		$ 0
Amount of Interest or Dividends Credited in Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0
Gross Additions		1,400
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		(1,400)
Fair Value, ending balance		0
Investment, Identifier [Axis]: STATINMED, LLC, First Lien
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		7,288
Amount of Interest or Dividends Credited in Income		699
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0
Gross Additions		7,479
Gross Reductions		(191)
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Fair Value, ending balance		7,288
Investment, Identifier [Axis]: STATinMED, LLC, Delayed Draw Term Loan
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		122
Amount of Interest or Dividends Credited in Income		6
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0
Gross Additions		121
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		1
Fair Value, ending balance		$ 122
Investment, Identifier [Axis]: Sonobi, Inc., Class A Common units
Schedule of Investments [Line Items]
Shares (in shares)		500,000
Principal Amount - Debt Investments		$ 0
Amount of Interest or Dividends Credited in Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		2,960
Gross Additions		0
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		(1,211)
Fair Value, ending balance		1,749
Investment, Identifier [Axis]: Student Resource Center LLC, First Lien
Schedule of Investments [Line Items]
Principal Amount - Debt Investments		8,889
Amount of Interest or Dividends Credited in Income		195
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0
Gross Additions		8,727
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		(7)
Fair Value, ending balance		$ 8,720
Investment, Identifier [Axis]: Student Resource Center LLC, Preferred units 1
Schedule of Investments [Line Items]
Shares (in shares)		10,502,487.46
Principal Amount - Debt Investments		$ 0
Amount of Interest or Dividends Credited in Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0
Gross Additions		5,845
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Fair Value, ending balance		$ 5,845
Investment, Identifier [Axis]: Student Resource Center LLC, Preferred units 2
Schedule of Investments [Line Items]
Shares (in shares)		2,000,000
Principal Amount - Debt Investments		$ 0
Amount of Interest or Dividends Credited in Income		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Fair Value, beginning balance		0
Gross Additions		0
Gross Reductions		0
Amount of Realized Gain/(Loss)		0
Amount of Unrealized Gain/(Loss)		0
Fair Value, ending balance		$ 0

[1] All of the Company’s investments and the investments of SBIC I (as defined below), unless otherwise noted, are pledged as collateral for the Company’s senior secured credit facility or in support of the SBA-guaranteed debentures to be issued by Capital Southwest SBIC I, LP, our wholly-owned subsidiary that operates as a small business investment company ("SBIC I"), respectively.

[2] All of the Company’s investments and the investments of SBIC I (as defined below), unless otherwise noted, are pledged as collateral for the Company’s senior secured credit facility or in support of the SBA-guaranteed debentures to be issued by Capital Southwest SBIC I, LP, our wholly-owned subsidiary that operates as a small business investment company ("SBIC I"), respectively.

[3] Income producing through dividends or distributions.

[4] Indicates assets that are not considered "qualifying assets" 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. As of March 31, 2023, approximately 13.9% of the Company's assets were non-qualifying assets.

[5] The investment has an unfunded commitment as of March 31, 2023. Refer to Note 11 - Commitments and Contingencies for further discussion.

[6] Income producing through dividends or distributions.

[7] Indicates assets that are considered "non-qualifying assets” 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. As of March 31, 2022, approximately 12.8% of the Company's assets are non-qualifying assets.

[8] The investment has an unfunded commitment as of March 31, 2022. Refer to Note 11 - Commitments and Contingencies for further discussion.

[9] Investment is held through a wholly-owned taxable subsidiary.

[10] Investment is held through a wholly-owned taxable subsidiary.