v3.26.1
Investments - Summary of Changes in Portfolio Investment Assets Measured at Fair Value Using Significant Unobservable Inputs (Level 3) (Details) - Level 3 - USD ($)
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Ending balance, of Level 3 Assets $ 48,480,496 $ 70,818,041
Total realized gains, net 2,034,519 925,332
Total unrealized (losses) gains (2,377,667) (11,610,598)
Purchases of securities/changes to securities/non-cash conversions 12,392,077 1,677,704
Repayments and sales of securities (4,028,519) (9,446,225)
Ending balance, of Level 3 Assets 56,500,906 52,364,254
Change in unrealized appreciation/depreciation included in earnings related to Level 3 investments still held at reporting date (1,326,008) (10,890,598)
Autotality (formerly Filterworks Acquisition USA, LLC)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized (losses) gains (1,023,457)  
Purchases of securities/changes to securities/non-cash conversions 123,886 73,675
Bauer    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized (losses) gains 288,000  
Purchases of securities/changes to securities/non-cash conversions 1,200  
BlackJet    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Purchases of securities/changes to securities/non-cash conversions 11,361  
AME Holdco, LLC    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Purchases of securities/changes to securities/non-cash conversions 4,000,000  
Swanson    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized (losses) gains (2,537,551)  
Purchases of securities/changes to securities/non-cash conversions 32,964  
FSS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized (losses) gains   (497,619)
Purchases of securities/changes to securities/non-cash conversions 400,000 435,031
Caitec    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized (losses) gains 50,000  
Purchases of securities/changes to securities/non-cash conversions 100,994 324,366
Carolina Skiff    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total realized gains, net 3,112  
Total unrealized (losses) gains   (442,755)
Purchases of securities/changes to securities/non-cash conversions   34,755
Repayments and sales of securities (3,112)  
FCM    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized (losses) gains   484,837
Purchases of securities/changes to securities/non-cash conversions 27,538 24,893
GoNoodle    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total realized gains, net   (25)
Purchases of securities/changes to securities/non-cash conversions 7,283 7,211
Hilton Displays    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Repayments and sales of securities   (1,071,824)
Highland    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized (losses) gains 400,000  
Purchases of securities/changes to securities/non-cash conversions 66,818 64,176
EFINEA    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized (losses) gains 400,000 488,235
Purchases of securities/changes to securities/non-cash conversions 8,480  
ITA    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized (losses) gains   (875,000)
Purchases of securities/changes to securities/non-cash conversions   375,000
Mattison    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Repayments and sales of securities   (5,572,902)
Microcision    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total realized gains, net   55,357
Repayments and sales of securities   (55,357)
Mobile IV Nurses    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized (losses) gains   125,000
Purchases of securities/changes to securities/non-cash conversions 12,746 12,617
MRES    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized (losses) gains (403,000) (739,352)
Purchases of securities/changes to securities/non-cash conversions 680,924 239,352
Pressure Pro    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total realized gains, net   870,000
Total unrealized (losses) gains   (720,000)
Purchases of securities/changes to securities/non-cash conversions   22,445
Repayments and sales of securities   (2,625,150)
Seybert    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total realized gains, net 1,072,459  
Total unrealized (losses) gains (1,051,659) 256,000
Purchases of securities/changes to securities/non-cash conversions   64,183
Repayments and sales of securities (1,316,459) (120,992)
Applied Image, Inc.    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total realized gains, net 958,948  
Repayments and sales of securities (2,708,948)  
4 Seasons    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized (losses) gains 200,000  
Purchases of securities/changes to securities/non-cash conversions 4,516,250  
Open Exchange, Inc.    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized (losses) gains 300,000  
Verta    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized (losses) gains 1,000,000  
Termite Guy    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Purchases of securities/changes to securities/non-cash conversions 2,401,633  
Lumious    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized (losses) gains   (189,944)
Tilson    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized (losses) gains   (9,500,000)
Loan investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Ending balance, of Level 3 Assets 3,154,587 15,037,873
Total unrealized (losses) gains (1,787,551) (1,064,944)
Purchases of securities/changes to securities/non-cash conversions 32,964 699,366
Repayments and sales of securities 0 (5,572,902)
Transfers within Level 3   (4,799,278)
Ending balance, of Level 3 Assets 1,400,000 4,300,115
Loan investments | Swanson    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized (losses) gains (1,787,551)  
Purchases of securities/changes to securities/non-cash conversions 32,964  
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   324,366
Loan investments | ITA    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized (losses) gains   (875,000)
Purchases of securities/changes to securities/non-cash conversions   375,000
Loan investments | Mattison    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Repayments and sales of securities   (5,572,902)
Loan investments | Lumious    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized (losses) gains   (189,944)
Debt investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Ending balance, of Level 3 Assets 35,302,967 38,043,721
Total unrealized (losses) gains (1,226,457) (254,515)
Purchases of securities/changes to securities/non-cash conversions 11,009,113 943,583
Repayments and sales of securities (1,750,000) (2,917,966)
Transfers within Level 3   4,799,278
Ending balance, of Level 3 Assets 43,335,623 40,614,101
Debt investments | Autotality (formerly Filterworks Acquisition USA, LLC)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized (losses) gains (1,023,457)  
Purchases of securities/changes to securities/non-cash conversions 123,886 73,675
Debt investments | Bauer    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Purchases of securities/changes to securities/non-cash conversions 1,200  
Debt investments | BlackJet    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Purchases of securities/changes to securities/non-cash conversions 11,361  
Debt investments | AME Holdco, LLC    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Purchases of securities/changes to securities/non-cash conversions 3,000,000  
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 400,000 435,031
Debt investments | Caitec    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Purchases of securities/changes to securities/non-cash conversions 50,994  
Debt investments | FCM    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized (losses) gains   484,837
Purchases of securities/changes to securities/non-cash conversions 27,538 24,893
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 7,283 7,211
Debt investments | Hilton Displays    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Repayments and sales of securities   (1,071,824)
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 66,818 64,176
Debt investments | EFINEA    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Purchases of securities/changes to securities/non-cash conversions 8,480  
Debt investments | Mobile IV Nurses    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Purchases of securities/changes to securities/non-cash conversions 12,746 12,617
Debt investments | MRES    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized (losses) gains (403,000) (739,352)
Purchases of securities/changes to securities/non-cash conversions 680,924 239,352
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   22,445
Repayments and sales of securities   (1,725,150)
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   64,183
Repayments and sales of securities   (120,992)
Debt investments | Applied Image, Inc.    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Repayments and sales of securities (1,750,000)  
Debt investments | 4 Seasons    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized (losses) gains 200,000  
Purchases of securities/changes to securities/non-cash conversions 4,516,250  
Debt investments | Termite Guy    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Purchases of securities/changes to securities/non-cash conversions 2,101,633  
Equity investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Ending balance, of Level 3 Assets 10,022,942 17,736,447
Total realized gains, net $ 2,034,519 $ 925,332
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Realized Gain (Loss), Investment and Derivative, Operating, before Tax Realized Gain (Loss), Investment and Derivative, Operating, before Tax
Total unrealized (losses) gains $ 636,341 $ (10,291,139)
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Unrealized Gain (Loss), Investment and Derivative, Operating, before Tax Unrealized Gain (Loss), Investment and Derivative, Operating, before Tax
Purchases of securities/changes to securities/non-cash conversions $ 1,350,000 $ 34,755
Repayments and sales of securities (2,278,519) (955,357)
Ending balance, of Level 3 Assets 11,765,283 7,450,038
Equity investments | Bauer    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized (losses) gains 288,000  
Equity investments | AME Holdco, LLC    
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  
Equity investments | Swanson    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized (losses) gains (750,000)  
Equity investments | FSS    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized (losses) gains   (497,619)
Equity investments | Caitec    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized (losses) gains 50,000  
Purchases of securities/changes to securities/non-cash conversions 50,000  
Equity investments | Carolina Skiff    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total realized gains, net 3,112  
Total unrealized (losses) gains   (442,755)
Purchases of securities/changes to securities/non-cash conversions   34,755
Repayments and sales of securities (3,112)  
Equity investments | GoNoodle    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total realized gains, net   (25)
Equity investments | Highland    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized (losses) gains 400,000  
Equity investments | EFINEA    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized (losses) gains 400,000 488,235
Equity investments | Microcision    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total realized gains, net   55,357
Repayments and sales of securities   (55,357)
Equity investments | Mobile IV Nurses    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized (losses) gains   125,000
Equity investments | Pressure Pro    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total realized gains, net   870,000
Total unrealized (losses) gains   (720,000)
Repayments and sales of securities   (900,000)
Equity investments | Seybert    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total realized gains, net 1,072,459  
Total unrealized (losses) gains (1,051,659) 256,000
Repayments and sales of securities (1,316,459)  
Equity investments | Applied Image, Inc.    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total realized gains, net 958,948  
Repayments and sales of securities (958,948)  
Equity investments | Open Exchange, Inc.    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized (losses) gains 300,000  
Equity investments | Verta    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized (losses) gains 1,000,000  
Equity investments | Termite Guy    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Purchases of securities/changes to securities/non-cash conversions $ 300,000  
Equity investments | Tilson    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total unrealized (losses) gains   $ (9,500,000)