Note 2 - Investments - Mortgage Loans by Property Type (Details) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Total commercial mortgages	$ 3,226,212	$ 3,653,142
Condominium [Member]
Total commercial mortgages	1,323,740	1,960,547
Multi-property [Member]
Total commercial mortgages	1,564,501	1,157,950
Multifamily [Member]
Total commercial mortgages	$ 337,971	$ 534,645