Annual report pursuant to Section 13 and 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 ($)
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Change in unrealized appreciation/depreciation on investments for the period included in changes in net assets $ 2,972,084 $ (5,909,772) $ 12,369,606
Net realized gain on investments for the period included in changes in net assets 3,558,917 (5,312,259) 18,402,336
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 gains (losses) (667,688) (1,258,637)  
Total unrealized gains (losses) 2,035,857 627,608  
Purchases of securities/changes to securities/non-cash conversions 21,599,244 7,790,450  
Repayments and sales of securities (8,248,062) (2,230,127)  
Ending balance, of Level 3 Assets 69,816,062 55,096,711 50,167,417
Change in unrealized appreciation/depreciation on investments for the period included in changes in net assets (474,273) (1,048,233)  
Level 3 | Clearview Social      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total realized gains (losses) 10,432 53,783  
Repayments and sales of securities (10,432) (53,783)  
Level 3 | Givegab      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total realized gains (losses)   1,919  
Repayments and sales of securities   (1,919)  
Level 3 | Microcision      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total realized gains (losses) 115,010 190,000  
Total unrealized gains (losses)   25,000  
Repayments and sales of securities (115,010) (300,000)  
Level 3 | New Monarch      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total realized gains (losses)   (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 gains (losses) (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 | Carolina Skiff      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total unrealized gains (losses) (249,000) 657,000  
Level 3 | Mercantile      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total realized gains (losses) 3,440    
Repayments and sales of securities (3,440)    
Level 3 | Caitec      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total unrealized gains (losses) (300,000)    
Purchases of securities/changes to securities/non-cash conversions 301,128 73,326  
Level 3 | DSD      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total realized gains (losses) 2,459,819    
Total unrealized gains (losses) (886,698) 886,698  
Purchases of securities/changes to securities/non-cash conversions 31,652 380,599  
Repayments and sales of securities (6,698,753)    
Level 3 | Knoa Software      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total unrealized gains (losses)   (379,155)  
Level 3 | OnCore      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total unrealized gains (losses)   (200,000)  
Level 3 | Open Exchange      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total unrealized gains (losses) (701,940) (4,168,060)  
Level 3 | Post Process      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total unrealized gains (losses) (100,000) (248,875)  
Level 3 | Rheonix      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total realized gains (losses) (2,802,731)    
Total unrealized gains (losses) 2,802,731    
Level 3 | Somerset      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total realized gains (losses) (448,717)    
Total unrealized gains (losses) 594,097 (375,000)  
Repayments and sales of securities (270,380)    
Level 3 | First Coast Mulch      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Purchases of securities/changes to securities/non-cash conversions 3,818,156    
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 247,841 325,720  
Level 3 | FSS      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total unrealized gains (losses) 610,000    
Purchases of securities/changes to securities/non-cash conversions 4,535,000 3,100,000  
Repayments and sales of securities (850,047)    
Level 3 | Swanson      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total unrealized gains (losses) 266,667    
Purchases of securities/changes to securities/non-cash conversions 100,115    
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 14,170 14,142  
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 22,523 26,587  
Repayments and sales of securities (300,000)    
Level 3 | All About People      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Purchases of securities/changes to securities/non-cash conversions 4,049,187    
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 4,349,839    
Level 3 | ITA      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total unrealized gains (losses)   (748,810)  
Purchases of securities/changes to securities/non-cash conversions 612,753 723,405  
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 37,934 37,175  
Level 3 | Empire      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Repayments and sales of securities   (1,444,915)  
Level 3 | Lumious      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Repayments and sales of securities   (70,833)  
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 3,093,436    
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 125,569 2,504,496  
Level 3 | Sciaps      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total unrealized gains (losses)   2,152,984  
Purchases of securities/changes to securities/non-cash conversions 5,000 605,000  
Level 3 | Tilson      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total unrealized gains (losses)   1,374,985  
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 1,011,060 590,695  
Repayments and sales of securities (3,171,434) (1,515,748)  
Ending balance, of Level 3 Assets 12,417,977 14,578,351 15,503,404
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 228,606 73,326  
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 31,652 380,599  
Repayments and sales of securities (3,171,434)    
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 100,115    
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 612,753 99,595  
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 37,934 37,175  
Level 3 | Loan investments | Empire      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Repayments and sales of securities   (1,444,915)  
Level 3 | Loan investments | Lumious      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Repayments and sales of securities   (70,833)  
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 18,218,956 5,642,713  
Repayments and sales of securities (940,047) (90,175)  
Ending balance, of Level 3 Assets 36,861,525 19,582,616 14,030,078
Level 3 | Debt investments | First Coast Mulch      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Purchases of securities/changes to securities/non-cash conversions 3,818,156    
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 247,841 186,488  
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 4,535,000 2,500,000  
Repayments and sales of securities (640,047)    
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 14,170 14,142  
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 22,523 26,587  
Repayments and sales of securities (300,000)    
Level 3 | Debt investments | All About People      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Purchases of securities/changes to securities/non-cash conversions 3,049,187    
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 3,338,074    
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 3,063,436    
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 125,569 2,310,496  
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 5,000 605,000  
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 gains (losses) (667,688) (1,258,637)  
Total unrealized gains (losses) 2,035,857 627,608  
Purchases of securities/changes to securities/non-cash conversions 2,369,228 1,557,042  
Repayments and sales of securities (4,136,581) (624,204)  
Ending balance, of Level 3 Assets 20,536,560 20,935,744 $ 20,633,935
Level 3 | Equity investments | Clearview Social      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total realized gains (losses) 10,432 53,783  
Repayments and sales of securities (10,432) (53,783)  
Level 3 | Equity investments | Givegab      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total realized gains (losses)   1,919  
Repayments and sales of securities   (1,919)  
Level 3 | Equity investments | Microcision      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total realized gains (losses) 115,010 190,000  
Total unrealized gains (losses)   25,000  
Repayments and sales of securities (115,010) (300,000)  
Level 3 | Equity investments | New Monarch      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total realized gains (losses)   (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 gains (losses) (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 | Carolina Skiff      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total unrealized gains (losses) (249,000) 657,000  
Level 3 | Equity investments | Mercantile      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total realized gains (losses) 3,440    
Repayments and sales of securities (3,440)    
Level 3 | Equity investments | Caitec      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total unrealized gains (losses) (300,000)    
Purchases of securities/changes to securities/non-cash conversions 72,522    
Level 3 | Equity investments | DSD      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total realized gains (losses) 2,459,819    
Total unrealized gains (losses) (886,698) 886,698  
Repayments and sales of securities (3,527,319)    
Level 3 | Equity investments | Knoa Software      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total unrealized gains (losses)   (379,155)  
Level 3 | Equity investments | OnCore      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total unrealized gains (losses)   (200,000)  
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) (4,168,060)  
Level 3 | Equity investments | Post Process      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total unrealized gains (losses) (100,000) (248,875)  
Level 3 | Equity investments | Rheonix      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total realized gains (losses) (2,802,731)    
Total unrealized gains (losses) 2,802,731    
Level 3 | Equity investments | Somerset      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total realized gains (losses) (448,717)    
Total unrealized gains (losses) 594,097 (375,000)  
Repayments and sales of securities (270,380)    
Level 3 | Equity investments | Filterworks      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Purchases of securities/changes to securities/non-cash conversions   139,232  
Level 3 | Equity investments | FSS      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total unrealized gains (losses) 610,000    
Purchases of securities/changes to securities/non-cash conversions   600,000  
Repayments and sales of securities (210,000)    
Level 3 | Equity investments | Swanson      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total unrealized gains (losses) 266,667    
Level 3 | Equity investments | All About People      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Purchases of securities/changes to securities/non-cash conversions 1,000,000    
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]      
Total unrealized gains (losses)   (748,810)  
Purchases of securities/changes to securities/non-cash conversions   623,810  
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 | Seybert      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Purchases of securities/changes to securities/non-cash conversions   194,000  
Level 3 | Equity investments | Sciaps      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total unrealized gains (losses)   2,152,984  
Level 3 | Equity investments | Tilson      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total unrealized gains (losses)   $ 1,374,985  
Purchases of securities/changes to securities/non-cash conversions $ 250,000