Note 2 - Investments - Mortgage Loans by Property Type (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Commercial mortgage loans	$ 19,638,897	$ 23,790,073
Allowance for credit losses	(21,644)	0
Total commercial mortgages	19,617,253	23,790,073
Condominium [Member]
Commercial mortgage loans	377,621	1,696,975
Land [Member]
Commercial mortgage loans	0	1,902,277
Multi-property [Member]
Commercial mortgage loans	8,923,604	9,539,738
Multifamily [Member]
Commercial mortgage loans	2,855,008	5,016,424
Industrial Property [Member]
Commercial mortgage loans	1,000,000	0
Retail [Member]
Commercial mortgage loans	$ 6,482,664	$ 5,634,659