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
Mar. 31, 2024
Mar. 31, 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 $ (2,890,296) $ 1,401,973
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 losses, net   53,388
Total unrealized gains (losses) (100,000)  
Purchases of securities/changes to securities/non-cash conversions 11,173,709 5,798,979
Repayments and sales of securities (2,581,906) (568,329)
Ending balance, of Level 3 Assets 78,307,865 60,380,749
Change in unrealized appreciation/depreciation included in earnings related to Level 3 investments still held at reporting date (100,000)  
Level 3 | Clearview Social    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total realized losses, net   3,019,250
Level 3 | Microcision    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total realized losses, net 3,207,545 58,329
Repayments and sales of securities   (58,329)
Level 3 | Social Flow    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total realized losses, net   (4,941)
Total unrealized gains (losses)   4,941
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 139,094 18,310
Level 3 | DSD    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Purchases of securities/changes to securities/non-cash conversions   15,699
Level 3 | Knoa    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized gains (losses) (100,000)  
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 14,565 72,410
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   (210,000)
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 11,169  
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 3,565 3,529
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 5,310 6,639
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 30,831  
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 16,904  
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 388,475 44,387
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 5,503,056 9,283
Repayments and sales of securities (1,894,470)  
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 21,515  
Repayments and sales of securities (687,436)  
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 1,831,680 30,781
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   3,750
Level 3 | Tilson    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized gains (losses)   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 12,417,977 14,578,351
Purchases of securities/changes to securities/non-cash conversions 6,030,625 87,679
Repayments and sales of securities (1,894,470)  
Ending balance, of Level 3 Assets 16,554,132 14,666,030
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 139,094 18,310
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   15,699
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 388,475 44,387
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 5,503,056 9,283
Repayments and sales of securities (1,894,470)  
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 4,878,539 5,426,359
Repayments and sales of securities (687,436) (300,000)
Ending balance, of Level 3 Assets 41,052,628 24,708,975
Level 3 | Debt investments | Clearview Social    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total realized losses, net   2,989,250
Level 3 | Debt investments | Microcision    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total realized losses, net 2,943,000  
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 14,565 72,410
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 11,169  
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 3,565 3,529
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 5,310 6,639
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 30,831  
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 16,904  
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 21,515  
Repayments and sales of securities (687,436)  
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 1,831,680 30,781
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   3,750
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 losses, net   53,388
Total unrealized gains (losses) (100,000)  
Purchases of securities/changes to securities/non-cash conversions 264,545 284,941
Repayments and sales of securities   (268,329)
Ending balance, of Level 3 Assets 20,701,105 21,005,744
Level 3 | Equity investments | Clearview Social    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total realized losses, net   30,000
Level 3 | Equity investments | Microcision    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total realized losses, net 264,545 58,329
Repayments and sales of securities   (58,329)
Level 3 | Equity investments | Social Flow    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total realized losses, net   (4,941)
Total unrealized gains (losses)   4,941
Level 3 | Equity investments | Knoa    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized gains (losses) $ (100,000)  
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 | Tilson    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized gains (losses)   $ 250,000