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, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
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 $ 7,779,026 $ (1,367,270) $ 4,888,730 $ 34,703
Level 3        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Ending balance, of Level 3 Assets     69,816,062 55,096,711
Total realized gains (losses), net     (831,891) 2,152,868
Total unrealized gains (losses)     8,749,945 (994,541)
Purchases of securities/changes to securities/non-cash conversions     11,754,635 10,799,925
Repayments and sales of securities     (3,754,024) (7,665,887)
Ending balance, of Level 3 Assets 85,734,727 59,389,076 85,734,727 59,389,076
Change in unrealized appreciation/depreciation included in earnings related to Level 3 investments still held at reporting date     7,620,790 (701,940)
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     283,170 36,916
Level 3 | Clearview Social        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Total realized gains (losses), net       10,432
Repayments and sales of securities       (10,432)
Level 3 | DSD        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Total realized gains (losses), net       2,537,765
Total unrealized gains (losses)       (886,698)
Purchases of securities/changes to securities/non-cash conversions       31,652
Repayments and sales of securities       (6,776,699)
Level 3 | FCM        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     22,623  
Level 3 | Filterworks        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Total unrealized gains (losses)     (196,226)  
Purchases of securities/changes to securities/non-cash conversions     102,396 147,638
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     107,619 2,320,000
Repayments and sales of securities     (34,838) (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     7,139 7,067
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     10,646 11,868
Repayments and sales of securities       (300,000)
Level 3 | Highland        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     61,973  
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     25,392 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     449,086 495,528
Level 3 | Knoa        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Total realized gains (losses), net     (1,229,155)  
Total unrealized gains (losses)     1,129,155  
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     5,572,902 18,716
Repayments and sales of securities     (1,894,470)  
Level 3 | MRES        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     3,210,545  
Level 3 | Microcision        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Total realized gains (losses), net       58,329
Repayments and sales of securities       (58,329)
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 | Pressure Pro        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Total unrealized gains (losses)     470,000  
Purchases of securities/changes to securities/non-cash conversions     37,637 3,043,635
Repayments and sales of securities     (1,427,452)  
Level 3 | Social Flow        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Total realized gains (losses), net       (4,941)
Purchases of securities/changes to securities/non-cash conversions       4,941
Level 3 | Somerset        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Total realized gains (losses), net       (448,717)
Total unrealized gains (losses)       594,097
Repayments and sales of securities       (270,380)
Level 3 | Sciaps        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Total unrealized gains (losses)     5,586,016  
Purchases of securities/changes to securities/non-cash conversions       5,000
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     1,863,507 62,019
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 | Tilson        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Total realized gains (losses), net     397,264  
Total unrealized gains (losses)     1,761,000  
Purchases of securities/changes to securities/non-cash conversions       250,000
Repayments and sales of securities     (397,264)  
Level 3 | Loan investments        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Ending balance, of Level 3 Assets     12,417,977 14,578,351
Purchases of securities/changes to securities/non-cash conversions     6,305,158 631,838
Repayments and sales of securities     (1,894,470) (3,171,434)
Ending balance, of Level 3 Assets 16,828,665 12,038,755 16,828,665 12,038,755
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     283,170 36,916
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
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     449,086 495,528
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     5,572,902 18,716
Repayments and sales of securities     (1,894,470)  
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 | Debt investments        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Ending balance, of Level 3 Assets     36,861,525 19,582,616
Purchases of securities/changes to securities/non-cash conversions     5,077,313 8,871,381
Repayments and sales of securities     (1,462,290) (340,047)
Ending balance, of Level 3 Assets 40,476,548 28,113,950 40,476,548 28,113,950
Level 3 | Debt investments | FCM        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     22,623  
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     102,396 147,638
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     (34,838) (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     7,139 7,067
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     10,646 11,868
Repayments and sales of securities       (300,000)
Level 3 | Debt investments | Highland        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     61,973  
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     25,392 3,304,154
Level 3 | Debt investments | MRES        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     2,946,000  
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     37,637 3,013,635
Repayments and sales of securities     (1,427,452)  
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
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     1,863,507 62,019
Level 3 | Equity investments        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Ending balance, of Level 3 Assets     20,536,560 20,935,744
Total realized gains (losses), net     (831,891) 2,152,868
Total unrealized gains (losses)     8,749,945 (994,541)
Purchases of securities/changes to securities/non-cash conversions     372,164 1,296,706
Repayments and sales of securities     (397,264) (4,154,406)
Ending balance, of Level 3 Assets $ 28,429,514 $ 19,236,371 28,429,514 19,236,371
Level 3 | Equity investments | Clearview Social        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Total realized gains (losses), net       10,432
Repayments and sales of securities       (10,432)
Level 3 | Equity investments | DSD        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Total realized gains (losses), net       2,537,765
Total unrealized gains (losses)       (886,698)
Repayments and sales of securities       (3,605,265)
Level 3 | Equity investments | Filterworks        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Total unrealized gains (losses)     (196,226)  
Level 3 | Equity investments | FSS        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     107,619  
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 | Knoa        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Total realized gains (losses), net     (1,229,155)  
Total unrealized gains (losses)     1,129,155  
Level 3 | Equity investments | MRES        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Purchases of securities/changes to securities/non-cash conversions     264,545  
Level 3 | Equity investments | Microcision        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Total realized gains (losses), net       58,329
Repayments and sales of securities       (58,329)
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 | Pressure Pro        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Total unrealized gains (losses)     470,000  
Purchases of securities/changes to securities/non-cash conversions       30,000
Level 3 | Equity investments | Social Flow        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Total realized gains (losses), net       (4,941)
Purchases of securities/changes to securities/non-cash conversions       4,941
Level 3 | Equity investments | Somerset        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Total realized gains (losses), net       (448,717)
Total unrealized gains (losses)       594,097
Repayments and sales of securities       (270,380)
Level 3 | Equity investments | Sciaps        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Total unrealized gains (losses)     5,586,016  
Level 3 | Equity investments | Tilson        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Total realized gains (losses), net     397,264  
Total unrealized gains (losses)     1,761,000  
Purchases of securities/changes to securities/non-cash conversions       $ 250,000
Repayments and sales of securities     $ (397,264)