Note 2 - Investments - Mortgage Loans by Property Type (Details) - USD ($)	Jun. 30, 2023	Dec. 31, 2022
Commercial mortgage loans	$ 24,329,346	$ 23,790,073
Allowance for credit losses	(34,611)	0
Total commercial mortgages	24,294,735	23,790,073
Condominium [Member]
Commercial mortgage loans	1,776,547	1,696,975
Land [Member]
Commercial mortgage loans	1,902,277	1,902,277
Multi-property [Member]
Commercial mortgage loans	9,514,050	9,539,738
Multifamily [Member]
Commercial mortgage loans	5,660,758	5,016,424
Retail [Member]
Commercial mortgage loans	$ 5,475,714	$ 5,634,659