Note 2 - Investments - Mortgage Loans by Loan-to-value Ratio (Details) - USD ($)	Sep. 30, 2024	Dec. 31, 2023
Loans	$ 25,716,381	$ 19,638,897
Allowance for credit losses	(53,794)	(21,644)
Carrying value	25,662,587	19,617,253
Debt-to-Value Ratio, 70 to 80 Percent [Member]
Loans	1,648,463	7,123,604
Debt-to-Value Ratio, 60 to 70 Percent [Member]
Loans	7,386,630	3,137,953
Debt-to-Value Ratio, 50 to 60 Percent [Member]
Loans	7,670,659	2,322,273
Debt-to-Value Ratio, 40 to 50 Percent [Member]
Loans	2,322,344	2,327,436
Debt-to-Value Ratio, 30 to 40 Percent [Member]
Loans	4,646,654	377,621
Debt-to-Value Ratio, 20 to 30 Percent [Member]
Loans	0	2,689,619
Debt-to-Value Ratio, 10 to 20 Percent [Member]
Loans	$ 2,041,631	$ 1,660,391