Annual report [Section 13 and 15(d), not S-K Item 405]

Stockholders' Equity (Net Assets) - Schedule of Changes in Equity Accounts (Details)

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Stockholders' Equity (Net Assets) - Schedule of Changes in Equity Accounts (Details) - USD ($)
 3 Months Ended 12 Months Ended
Dec. 31, 2024
Sep. 30, 2024
Jun. 30, 2024
Mar. 31, 2024
Dec. 31, 2023
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Net assets at beginning of year       $ 60,815,213       $ 57,721,320 $ 60,815,213 $ 57,721,320 $ 60,745,416
Dividend declaration                 (4,310,305) (3,432,757)  
Net increase (decrease) in net assets from operations $ (2,946,058) $ 2,636,516 $ 7,737,773 1,399,381 $ 1,088,979 $ 595,504 $ 2,671,890 2,170,277 8,827,612 6,526,650 (881,849)
Net assets at end of year 65,332,520       60,815,213       65,332,520 60,815,213 57,721,320
Common Stock                      
Net assets at beginning of year       264,892       264,892 264,892 264,892  
Net assets at end of year 264,892       264,892       264,892 264,892 264,892
Capital in Excess of Par Value                      
Net assets at beginning of year       55,801,170       51,464,267 55,801,170 51,464,267  
Tax reclassification of stockholders' equity in accordance with generally accepted accounting principles                 (381,550) 4,336,903  
Net assets at end of year 55,419,620       55,801,170       55,419,620 55,801,170 51,464,267
Stock Dividends Distributable                      
Dividend declaration                 8,672,231    
Net assets at end of year 8,672,231               8,672,231    
Treasury Stock, at cost                      
Net assets at beginning of year       (1,566,605)       (1,566,605) (1,566,605) (1,566,605)  
Net assets at end of year (1,566,605)       (1,566,605)       (1,566,605) (1,566,605) (1,566,605)
Total Distributable Earnings (Losses)                      
Net assets at beginning of year       $ 6,315,756       $ 7,558,766 6,315,756 7,558,766  
Dividend declaration                 (12,982,536) (3,432,757)  
Tax reclassification of stockholders' equity in accordance with generally accepted accounting principles                 381,550 (4,336,903)  
Net increase (decrease) in net assets from operations                 8,827,612 6,526,650  
Net assets at end of year $ 2,542,382       $ 6,315,756       $ 2,542,382 $ 6,315,756 $ 7,558,766