Note 2 - Investments - Mortgage Loans by Maturity Date (Details) - USD ($)	Mar. 31, 2023	Jan. 01, 2023	Dec. 31, 2022
One year or less		$ 18,876,776	$ 15,354,542
After one year through five years		6,545,355	8,435,531
Total	$ 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