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Investments - Schedule of Reconciliation of Investments Measured at Fair value on a recurring basis using Level 3 inputs (Details) - USD ($)
 12 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2022
Schedule Of Investment Income Reported Amounts By Category [Line Items]      
Investment Owned, at Fair Value, Beginning Balance $ 220,111,329    
Purchases (including PIK interest) 65,395,203 $ 53,237,881 $ 145,380,662
Investment sales and repayments 92,303,435 61,928,745 153,877,788
Amortization 2,049,993 1,311,770 2,662,806
Net realized gains (losses) (13,971,537) (26,890,095) (14,395,431)
Net change in unrealized appreciation (depreciation) 3,287,977 20,696,532 8,058,117
Investment Owned, at Fair Value, Ending Balance $ 184,569,530 $ 220,111,329  
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Interest Income, Operating, Paid in Kind Interest Income, Operating, Paid in Kind  
Senior Secured First Lien Debt Investments      
Schedule Of Investment Income Reported Amounts By Category [Line Items]      
Investment Owned, at Fair Value, Beginning Balance $ 196,370,955    
Investment Owned, at Fair Value, Ending Balance 156,927,316 $ 196,370,955  
Equity, Warrants and Other Investments      
Schedule Of Investment Income Reported Amounts By Category [Line Items]      
Investment Owned, at Fair Value, Beginning Balance 23,740,374    
Investment Owned, at Fair Value, Ending Balance 27,642,214 23,740,374  
Fair Value, Inputs, Level 3      
Schedule Of Investment Income Reported Amounts By Category [Line Items]      
Investment Owned, at Fair Value, Beginning Balance 220,111,329 233,683,986  
Purchases (including PIK interest) 65,395,203 53,237,881  
Investment sales and repayments (92,303,435) (61,928,745)  
Amortization 2,049,993 1,311,770  
Net realized gains (losses) (13,971,537) (26,890,095)  
Transfers in 4,362,023 1,708,942  
Transfers out (4,362,023) (1,708,942)  
Net change in unrealized appreciation (depreciation) 3,287,977 20,696,532  
Investment Owned, at Fair Value, Ending Balance 184,569,530 220,111,329 233,683,986
Change in unrealized appreciation (depreciation) (5,401,135) (6,129,454)  
Fair Value, Inputs, Level 3 | Senior Secured First Lien Debt Investments      
Schedule Of Investment Income Reported Amounts By Category [Line Items]      
Investment Owned, at Fair Value, Beginning Balance 196,370,955 214,858,036  
Purchases (including PIK interest) 60,523,383 51,824,515  
Investment sales and repayments (92,303,435) (61,928,745)  
Amortization 2,049,993 1,311,770  
Net realized gains (losses) (13,909,425) (9,515,487)  
Transfers in 0 0  
Transfers out (4,362,023) (1,708,942)  
Net change in unrealized appreciation (depreciation) 8,557,868 1,529,808  
Investment Owned, at Fair Value, Ending Balance 156,927,316 196,370,955 214,858,036
Change in unrealized appreciation (depreciation) (69,131) (7,507,021)  
Fair Value, Inputs, Level 3 | Senior Secured Second Lien Debt Investments      
Schedule Of Investment Income Reported Amounts By Category [Line Items]      
Investment Owned, at Fair Value, Beginning Balance 0 0  
Purchases (including PIK interest) 0 0  
Investment sales and repayments 0 0  
Amortization 0 0  
Net realized gains (losses) 0 (17,374,608)  
Transfers in 0 0  
Transfers out 0 0  
Net change in unrealized appreciation (depreciation) 0 17,374,608  
Investment Owned, at Fair Value, Ending Balance 0 0 0
Change in unrealized appreciation (depreciation) 0 0  
Fair Value, Inputs, Level 3 | Unsecured Debt Investments      
Schedule Of Investment Income Reported Amounts By Category [Line Items]      
Investment Owned, at Fair Value, Beginning Balance 0 0  
Purchases (including PIK interest) 0 0  
Investment sales and repayments 0 0  
Amortization 0 0  
Net realized gains (losses) 0 0  
Transfers in 0 0  
Transfers out 0 0  
Net change in unrealized appreciation (depreciation) 0 0  
Investment Owned, at Fair Value, Ending Balance 0 0 0
Change in unrealized appreciation (depreciation) 0 0  
Fair Value, Inputs, Level 3 | Equity, Warrants and Other Investments      
Schedule Of Investment Income Reported Amounts By Category [Line Items]      
Investment Owned, at Fair Value, Beginning Balance 23,740,374 18,825,950  
Purchases (including PIK interest) 4,871,820 1,413,366  
Investment sales and repayments 0 0  
Amortization 0 0  
Net realized gains (losses) (62,112) 0  
Transfers in 4,362,023 1,708,942  
Transfers out 0 0  
Net change in unrealized appreciation (depreciation) (5,269,891) 1,792,116  
Investment Owned, at Fair Value, Ending Balance 27,642,214 23,740,374 $ 18,825,950
Change in unrealized appreciation (depreciation) $ (5,332,004) $ 1,377,567