Note 2 - Investments - Mortgage Loans by Loan-to-value Ratio (Details) - USD ($)	Dec. 31, 2024	Dec. 31, 2023
Total commercial mortgages	$ 55,685	$ 21,644
Commercial mortgage loans	25,248,434	19,638,897
Allowance for credit losses	(55,685)	(21,644)
Total commercial mortgages	25,192,749	19,617,253
Debt-to-Value Ratio, 70 to 80 Percent [Member]
Total commercial mortgages	892,800	7,123,604
Allowance for credit losses	(892,800)	(7,123,604)
Debt-to-Value Ratio, 60 to 70 Percent [Member]
Total commercial mortgages	6,399,210	3,137,953
Allowance for credit losses	(6,399,210)	(3,137,953)
Debt-to-Value Ratio, 50 to 60 Percent [Member]
Total commercial mortgages	10,215,293	2,322,273
Allowance for credit losses	(10,215,293)	(2,322,273)
Debt-to-Value Ratio, 40 to 50 Percent [Member]
Total commercial mortgages	1,820,562	2,327,436
Allowance for credit losses	(1,820,562)	(2,327,436)
Debt-to-Value Ratio, 30 to 40 Percent [Member]
Total commercial mortgages	3,231,865	377,621
Allowance for credit losses	(3,231,865)	(377,621)
Debt-to-Value Ratio, 20 to 30 Percent [Member]
Total commercial mortgages	2,188,704	2,689,619
Allowance for credit losses	(2,188,704)	(2,689,619)
Debt-to-Value Ratio, 10 to 20 Percent [Member]
Total commercial mortgages	500,000	1,660,391
Allowance for credit losses	$ (500,000)	$ (1,660,391)