Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED SCHEDULE OF PORTFOLIO INVESTMENTS (Parenthetical)

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CONSOLIDATED SCHEDULE OF PORTFOLIO INVESTMENTS (Parenthetical) - USD ($)
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Schedule of Investments [Line Items]    
Percentage of fair value level 3 investments 91.00% 90.00%
Investment at Cost $ 68,365,606 $ 55,716,237
Interest due from investments $ 244,600 $ 208,338
Minimum percentage of total assets in qualifying assets 70.00% 70.00%
Percentage of aggregate assets in non-qualifying assets 5.38% 6.12%
Blocker corporation    
Schedule of Investments [Line Items]    
Equity owned percentage 100.00% 100.00%
Fair Value    
Schedule of Investments [Line Items]    
Investment at Cost $ 68,400,000 $ 55,700,000
Net unrealized appreciation 8,800,000 5,800,000
Unrealized appreciation of investment securities 14,100,000 13,500,000
Unrealized depreciation of investment securities 5,400,000 7,700,000
Aggregate gross unrealized gain for federal income tax 14,100,000 13,200,000
Aggregate gross unrealized loss for federal income tax 4,200,000 6,700,000
Net unrealized gain for federal income tax 9,900,000 6,500,000
Tax cost 68,000,000 55,000,000
Minimum    
Schedule of Investments [Line Items]    
Interest due from investments $ 50,000 $ 50,000
Percentage of voting securities 5.00% 5.00%
Percentage of board representation 50.00% 50.00%
Maximum    
Schedule of Investments [Line Items]    
Percentage of voting securities 25.00% 25.00%