Note 2 - Investments - Mortgage Loans by Property Type (Details) - USD ($)	Sep. 30, 2023	Dec. 31, 2022
Commercial mortgage loans	$ 21,757,193	$ 23,790,073
Allowance for credit losses	(34,611)	0
Total commercial mortgages	21,722,582	23,790,073
Condominium [Member]
Commercial mortgage loans	902,657	1,696,975
Land [Member]
Commercial mortgage loans	0	1,902,277
Multi-property [Member]
Commercial mortgage loans	9,795,198	9,539,738
Multifamily [Member]
Commercial mortgage loans	5,634,612	5,016,424
Retail [Member]
Commercial mortgage loans	$ 5,424,726	$ 5,634,659