Note 2 - Investments - Mortgage Loans by Property Type (Details) - USD ($)	Mar. 31, 2023	Jan. 01, 2023	Dec. 31, 2022
Commercial mortgage loans	$ 25,422,131	$ 25,422,131	$ 23,790,073
Allowance for credit losses	(137,148)	(137,148)	0
Total commercial mortgages	25,284,983	$ 25,284,983	23,790,073
Condominium [Member]
Commercial mortgage loans	1,696,975		1,696,975
Land [Member]
Commercial mortgage loans	1,902,277		1,902,277
Multi-property [Member]
Commercial mortgage loans	9,870,383		9,539,738
Multifamily [Member]
Commercial mortgage loans	5,334,609		5,016,424
Retail [Member]
Commercial mortgage loans	$ 6,617,887		$ 5,634,659