Note 3 - Investments - Mortgage Loans by Property Type (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Total commercial mortgages	$ 3,653,142	$ 3,166,136
Student Housing [Member]
Total commercial mortgages	0	781,512
Condominium [Member]
Total commercial mortgages	1,960,547	1,874,445
Multi-property [Member]
Total commercial mortgages	1,157,950	332,195
Multifamily [Member]
Total commercial mortgages	$ 534,645	$ 177,984