Note 2 - Investments - Mortgage Loans by Loan-to-value Ratio (Details) - USD ($)	Jun. 30, 2024	Dec. 31, 2023
Total commercial mortgages	$ 30,781	$ 21,644
Commercial mortgage loans	21,596,938	19,638,897
Allowance for credit losses	(30,781)	(21,644)
Total commercial mortgages	21,566,157	19,617,253
Debt-to-Value Ratio, 70 to 80 Percent [Member]
Total commercial mortgages	1,648,463	7,123,604
Allowance for credit losses	(1,648,463)	(7,123,604)
Debt-to-Value Ratio, 60 to 70 Percent [Member]
Total commercial mortgages	3,800,000	3,137,953
Allowance for credit losses	(3,800,000)	(3,137,953)
Debt-to-Value Ratio, 50 to 60 Percent [Member]
Total commercial mortgages	5,321,270	2,322,273
Allowance for credit losses	(5,321,270)	(2,322,273)
Debt-to-Value Ratio, 40 to 50 Percent [Member]
Total commercial mortgages	2,324,083	2,327,436
Allowance for credit losses	(2,324,083)	(2,327,436)
Debt-to-Value Ratio, 30 to 40 Percent [Member]
Total commercial mortgages	5,584,780	377,621
Allowance for credit losses	(5,584,780)	(377,621)
Debt-to-Value Ratio, 20 to 30 Percent [Member]
Total commercial mortgages	0	2,689,619
Allowance for credit losses	0	(2,689,619)
Debt-to-Value Ratio, 10 to 20 Percent [Member]
Total commercial mortgages	2,495,815	1,660,391
Allowance for credit losses	(2,495,815)	(1,660,391)
Debt-to-Value Ratio, Less Than 10 Percent [Member]
Total commercial mortgages	422,527	0
Allowance for credit losses	$ (422,527)	$ 0