Note 4 - Fair Value Measurements - Summary of Investments by Hierarchy Level (Details) - USD ($)	Jun. 30, 2026	Dec. 31, 2025
Investments, fair value	$ 262,645,641	$ 262,216,317
Fair Value, Inputs, Level 1 [Member]
Investments, fair value	0	0
Fair Value, Inputs, Level 2 [Member]
Investments, fair value	0	0
Fair Value, Inputs, Level 3 [Member]
Investments, fair value	262,645,641	262,216,317
Senior Secured Term Loan [Member]
Investments, fair value	128,864,890	123,807,284
Senior Secured Term Loan [Member] \| Fair Value, Inputs, Level 1 [Member]
Investments, fair value	0	0
Senior Secured Term Loan [Member] \| Fair Value, Inputs, Level 2 [Member]
Investments, fair value	0	0
Senior Secured Term Loan [Member] \| Fair Value, Inputs, Level 3 [Member]
Investments, fair value	128,864,890	123,807,284
Senior Secured Term Loan Participations [Member]
Investments, fair value	66,297,945	71,371,727
Senior Secured Term Loan Participations [Member] \| Fair Value, Inputs, Level 1 [Member]
Investments, fair value	0	0
Senior Secured Term Loan Participations [Member] \| Fair Value, Inputs, Level 2 [Member]
Investments, fair value	0	0
Senior Secured Term Loan Participations [Member] \| Fair Value, Inputs, Level 3 [Member]
Investments, fair value	66,297,945	71,371,727
Senior Secured Trade Finance Participations [Member]
Investments, fair value	24,859,079	26,493,018
Senior Secured Trade Finance Participations [Member] \| Fair Value, Inputs, Level 1 [Member]
Investments, fair value	0	0
Senior Secured Trade Finance Participations [Member] \| Fair Value, Inputs, Level 2 [Member]
Investments, fair value	0	0
Senior Secured Trade Finance Participations [Member] \| Fair Value, Inputs, Level 3 [Member]
Investments, fair value	24,859,079	26,493,018
Convertible Debt [Member]
Investments, fair value	30,806,874	29,092,471
Convertible Debt [Member] \| Fair Value, Inputs, Level 1 [Member]
Investments, fair value	0	0
Convertible Debt [Member] \| Fair Value, Inputs, Level 2 [Member]
Investments, fair value	0	0
Convertible Debt [Member] \| Fair Value, Inputs, Level 3 [Member]
Investments, fair value	30,806,874	29,092,471
Other Investment Companies [Member]
Investments, fair value	11,816,853	11,451,817
Other Investment Companies [Member] \| Fair Value, Inputs, Level 1 [Member]
Investments, fair value	0	0
Other Investment Companies [Member] \| Fair Value, Inputs, Level 2 [Member]
Investments, fair value	0	0
Other Investment Companies [Member] \| Fair Value, Inputs, Level 3 [Member]
Investments, fair value	11,816,853	11,451,817
Warrant [Member]
Investments, fair value	0	0
Warrant [Member] \| Fair Value, Inputs, Level 1 [Member]
Investments, fair value	0	0
Warrant [Member] \| Fair Value, Inputs, Level 2 [Member]
Investments, fair value	0	0
Warrant [Member] \| Fair Value, Inputs, Level 3 [Member]
Investments, fair value	$ 0	$ 0