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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.