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Significant Accounting Policies - Additional Information (Details)
 3 Months Ended 9 Months Ended
Mar. 31, 2023
USD ($)
Loans
Mar. 31, 2022
USD ($)
Mar. 31, 2023
USD ($)
Loans
Mar. 31, 2022
USD ($)
Jun. 30, 2022
USD ($)
Loans
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]          
Number of loans on Non-accrual status | Loans 4   4   6
Percentage of portfolio at fair value 1.32%   1.32%   1.10%
Interest Income $ 45,456 $ 254,499 $ 423,185 $ 865,539  
Investment company taxable income     90.00%    
Percentage of net ordinary income     98.00%    
Percentage of capital gain     98.20%    
Provision for tax expense 77,575 242,658 $ 187,763 270,618  
Excise tax 77,575 242,658 187,763 270,618  
Distributions 2,158,506 2,157,756 6,474,816 6,472,884  
Short-term capital loss carryforward,net         $ 1,844,656
Long-term capital loss carryforward,net         55,848,269
Short-term capital loss deferral         126,039
Long-term capital loss deferral         $ 15,395,122
Equity investments          
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]          
Payment in kind, Interest received 0 0 0 0  
Debt investments          
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]          
Payment in kind, Interest received $ 592,722 $ 94,522 $ 1,147,978 $ 284,155