Quarterly report pursuant to Section 13 or 15(d)

Investments - Summary of Changes in Assets Measured at Fair Value Using Significant Unobservable Inputs (Details)

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Investments - Summary of Changes in Assets Measured at Fair Value Using Significant Unobservable Inputs (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Change in unrealized appreciation/depreciation included in earnings related to Level 3 investments still held at reporting date $ (1,300,829) $ (4,854,669) $ 101,144 $ (5,185,738)
Level 3        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Ending balance, of Level 3 Assets     55,096,711 50,167,417
Total realized gain (losses), net     2,152,868 (1,275,458)
Total unrealized gains (losses)     (994,541) 1,675,841
Purchases of securities/changes to securities/non-cash conversions     10,799,925 3,045,182
Repayments and sales of securities     (7,665,887) (697,558)
Ending balance, of Level 3 Assets 59,389,076 52,915,424 59,389,076 52,915,424
Change in unrealized appreciation/depreciation included in earnings related to Level 3 investments still held at reporting date     (701,940) 0
Level 3 | Clearview Social        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Total realized gain (losses), net     10,432 38,881
Repayments and sales of securities     (10,432) (38,881)
Level 3 | Microcision        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Total realized gain (losses), net     58,329 190,000
Total unrealized gains (losses)       25,000
Repayments and sales of securities     (58,329) (300,000)
Level 3 | New Monarch        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Total realized gain (losses), net       (22,841)
Total unrealized gains (losses)       22,841
Level 3 | Social Flow        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Total realized gain (losses), net     (4,941) (1,481,498)
Total unrealized gains (losses)       1,628,000
Purchases of securities/changes to securities/non-cash conversions     4,941  
Repayments and sales of securities       (268,502)
Level 3 | Swanson        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     49,026  
Level 3 | Somerset        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Total realized gain (losses), net     (448,717)  
Total unrealized gains (losses)     594,097  
Repayments and sales of securities     (270,380)  
Level 3 | Caitec        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     36,916 36,178
Level 3 | DSD        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Total realized gain (losses), net     2,537,765  
Total unrealized gains (losses)     (886,698)  
Purchases of securities/changes to securities/non-cash conversions     31,652 348,748
Repayments and sales of securities     (6,776,699)  
Level 3 | Open Exchange        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Total unrealized gains (losses)     (701,940)  
Level 3 | Filterworks        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     147,638 107,559
Level 3 | FSS        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     2,320,000  
Repayments and sales of securities     (250,047)  
Level 3 | GoNoodle        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     7,067 7,110
Repayments and sales of securities       (90,175)
Level 3 | Hilton Displays        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     11,868 13,117
Repayments and sales of securities     (300,000)  
Level 3 | INEA        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     4,315,919  
Level 3 | ITA        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     495,528 258,511
Level 3 | Mattison        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     18,716 18,341
Level 3 | Pressure Pro        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     3,043,635  
Level 3 | Seybert        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     62,019 2,248,118
Level 3 | Sciaps        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     5,000 7,500
Level 3 | Tilson        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     250,000  
Level 3 | Loan investments        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Ending balance, of Level 3 Assets     14,578,351 15,503,404
Purchases of securities/changes to securities/non-cash conversions     631,838 437,968
Repayments and sales of securities     (3,171,434)  
Ending balance, of Level 3 Assets 12,038,755 15,941,372 12,038,755 15,941,372
Level 3 | Loan investments | Swanson        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     49,026  
Level 3 | Loan investments | Caitec        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     36,916 36,178
Level 3 | Loan investments | DSD        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     31,652 348,748
Repayments and sales of securities     (3,171,434)  
Level 3 | Loan investments | ITA        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     495,528 34,701
Level 3 | Loan investments | Mattison        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     18,716 18,341
Level 3 | Debt investments        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Ending balance, of Level 3 Assets     19,582,616 14,030,078
Purchases of securities/changes to securities/non-cash conversions     8,871,381 2,383,404
Repayments and sales of securities     (340,047) (90,175)
Ending balance, of Level 3 Assets 28,113,950 16,323,307 28,113,950 16,323,307
Level 3 | Debt investments | Filterworks        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     147,638 107,559
Level 3 | Debt investments | FSS        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     2,320,000  
Repayments and sales of securities     (40,047)  
Level 3 | Debt investments | GoNoodle        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     7,067 7,110
Repayments and sales of securities       (90,175)
Level 3 | Debt investments | Hilton Displays        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     11,868 13,117
Repayments and sales of securities     (300,000)  
Level 3 | Debt investments | INEA        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     3,304,154  
Level 3 | Debt investments | Pressure Pro        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     3,013,635  
Level 3 | Debt investments | Seybert        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     62,019 2,248,118
Level 3 | Debt investments | Sciaps        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     5,000 7,500
Level 3 | Equity investments        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Ending balance, of Level 3 Assets     20,935,744 20,633,935
Total realized gain (losses), net     2,152,868 (1,275,458)
Total unrealized gains (losses)     (994,541) 1,675,841
Purchases of securities/changes to securities/non-cash conversions     1,296,706 223,810
Repayments and sales of securities     (4,154,406) (607,383)
Ending balance, of Level 3 Assets $ 19,236,371 $ 20,650,745 19,236,371 20,650,745
Level 3 | Equity investments | Clearview Social        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Total realized gain (losses), net     10,432 38,881
Repayments and sales of securities     (10,432) (38,881)
Level 3 | Equity investments | Microcision        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Total realized gain (losses), net     58,329 190,000
Total unrealized gains (losses)       25,000
Repayments and sales of securities     (58,329) (300,000)
Level 3 | Equity investments | New Monarch        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Total realized gain (losses), net       (22,841)
Total unrealized gains (losses)       22,841
Level 3 | Equity investments | Social Flow        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Total realized gain (losses), net     (4,941) (1,481,498)
Total unrealized gains (losses)       1,628,000
Purchases of securities/changes to securities/non-cash conversions     4,941  
Repayments and sales of securities       (268,502)
Level 3 | Equity investments | Somerset        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Total realized gain (losses), net     (448,717)  
Total unrealized gains (losses)     594,097  
Repayments and sales of securities     (270,380)  
Level 3 | Equity investments | DSD        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Total realized gain (losses), net     2,537,765  
Total unrealized gains (losses)     (886,698)  
Repayments and sales of securities     (3,605,265)  
Level 3 | Equity investments | Open Exchange        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Total unrealized gains (losses)     (701,940)  
Level 3 | Equity investments | FSS        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Repayments and sales of securities     (210,000)  
Level 3 | Equity investments | INEA        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     1,011,765  
Level 3 | Equity investments | ITA        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions       $ 223,810
Level 3 | Equity investments | Pressure Pro        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     30,000  
Level 3 | Equity investments | Tilson        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     $ 250,000