v3.26.1
Note 4 - Fair Value Measurements - Reconciliation of Activity of Level 3 Investments (Details) - USD ($)
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Balance $ 262,216,317 $ 268,409,272
Purchases 0 0
Proceeds from disposition and paydowns of investments (5,988,018) (8,735,352)
Reclassifications 381,883 (3,904,117)
Capitalized payment-in-kind interest income 9,780,407 19,902,885
Net change in unrealized appreciation (depreciation) (3,744,948) (7,361,847)
Net realized gain (loss) 0 (6,094,524)
Balance 262,645,641 262,216,317
Capitalized payment-in-kind interest income 9,780,407 19,902,885
Net change in unrealized appreciation (depreciation) (3,744,948) (7,361,847)
Net realized gain (loss) 0 (6,094,524)
Senior Secured Term Loan [Member]    
Balance 123,807,284 121,679,322
Purchases 0 0
Proceeds from disposition and paydowns of investments 0 0
Reclassifications 0 (3,904,117)
Capitalized payment-in-kind interest income 7,333,443 14,872,272 [1]
Net change in unrealized appreciation (depreciation) (2,275,837) (8,840,193)
Net realized gain (loss) 0 0
Balance 128,864,890 123,807,284
Capitalized payment-in-kind interest income 7,333,443 14,872,272 [1]
Net change in unrealized appreciation (depreciation) (2,275,837) (8,840,193)
Net realized gain (loss) 0 0
Senior Secured Term Loan Participations [Member]    
Balance 71,371,727 78,156,693
Purchases 0 0
Proceeds from disposition and paydowns of investments (5,652,998) (6,632,559)
Reclassifications 0 0
Capitalized payment-in-kind interest income 732,561 1,852,138
Net change in unrealized appreciation (depreciation) (153,345) (2,004,545)
Net realized gain (loss) 0 0
Balance 66,297,945 71,371,727
Capitalized payment-in-kind interest income 732,561 1,852,138
Net change in unrealized appreciation (depreciation) (153,345) (2,004,545)
Net realized gain (loss) 0 0
Senior Secured Trade Finance Participations [Member]    
Balance 26,493,018 [1] 27,665,139
Purchases 0 [1] 0
Proceeds from disposition and paydowns of investments (60,874) [1] (776,478)
Reclassifications 381,883 [1] 0
Capitalized payment-in-kind interest income 0 [1] 0
Net change in unrealized appreciation (depreciation) (1,954,948) [1] 5,625,010
Net realized gain (loss) 0 [1] (6,020,653)
Balance [1] 24,859,079 26,493,018
Capitalized payment-in-kind interest income 0 [1] 0
Net change in unrealized appreciation (depreciation) (1,954,948) [1] 5,625,010
Net realized gain (loss) 0 [1] (6,020,653)
Convertible Debt [Member]    
Balance 29,092,471 25,387,189
Purchases 0 0
Proceeds from disposition and paydowns of investments 0 0
Reclassifications 0 0
Capitalized payment-in-kind interest income 1,714,403 3,178,475
Net change in unrealized appreciation (depreciation) 0 526,807
Net realized gain (loss) 0 0
Balance 30,806,874 29,092,471
Capitalized payment-in-kind interest income 1,714,403 3,178,475
Net change in unrealized appreciation (depreciation) 0 526,807
Net realized gain (loss) 0 0
Other Investment Companies [Member]    
Balance 11,451,817 13,054,395
Purchases 0 0
Proceeds from disposition and paydowns of investments (274,146) (1,326,315)
Reclassifications 0 0
Capitalized payment-in-kind interest income 0 0
Net change in unrealized appreciation (depreciation) 639,182 (202,392)
Net realized gain (loss) 0 (73,871)
Balance 11,816,853 11,451,817
Capitalized payment-in-kind interest income 0 0
Net change in unrealized appreciation (depreciation) 639,182 (202,392)
Net realized gain (loss) 0 (73,871)
Warrant [Member]    
Balance 0 2,466,534
Purchases 0 0
Proceeds from disposition and paydowns of investments 0 0
Reclassifications 0 0
Capitalized payment-in-kind interest income 0 0
Net change in unrealized appreciation (depreciation) 0 (2,466,534)
Net realized gain (loss) 0 0
Balance 0 0
Capitalized payment-in-kind interest income 0 0
Net change in unrealized appreciation (depreciation) 0 (2,466,534)
Net realized gain (loss) $ 0 $ 0
[1] The amount represents principal repayments received during the year ended December 31, 2025 that were inadvertently overallocated to the Company by the agent responsible for administering payments related to the settlement with CAGSA. See the Watch List Investments section below for more information regarding the settlement. As of June 30, 2026, the overallocated amount was reclassified from principal repayments to a payable account to reflect the Company's obligation to remit the excess funds to the appropriate parties.