Note 3 - Investments - Participation Interests Through Sub-advisors (Details) - USD ($)		Sep. 30, 2024	Dec. 31, 2023
Investment, fair value, sub-advisor	[1]	$ 267,287,486	$ 261,680,707
Participation in Loans [Member] | Asset Management Arrangement, Sub-advisor [Member]
Investment, fair value, sub-advisor		$ 76,847,564	$ 87,108,856
Percent of net assets		27.60%	32.00%
Participation in Loans [Member] | Asset Management Arrangement, Sub-advisor [Member] | CEECAT Capital Limited & CCL Investments SARL [Member]
Investment, fair value, sub-advisor		$ 11,399,439	$ 17,641,954
Percent of net assets		4.10%	6.50%
Participation in Loans [Member] | Asset Management Arrangement, Sub-advisor [Member] | Origin Capital Limited [Member]
Investment, fair value, sub-advisor		$ 15,856,629	$ 15,467,634
Percent of net assets		5.70%	5.70%
Participation in Loans [Member] | Asset Management Arrangement, Sub-advisor [Member] | Scipion Capital, Ltd [Member]
Investment, fair value, sub-advisor		$ 17,337,262	$ 17,917,084
Percent of net assets		6.20%	6.60%
Participation in Loans [Member] | Asset Management Arrangement, Sub-advisor [Member] | TRG Management LP [Member]
Investment, fair value, sub-advisor		$ 32,254,234	$ 36,082,184
Percent of net assets		11.60%	13.20%

[1] Refer to Notes 2, 3 and 4 of the consolidated financial statements for additional information on the Company’s investments.