Note 2 - Investments - Realized Gains and Losses Related to the Sale of Securities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Gross gains	$ 14,399	$ 24,720
Gross losses	(772,000)	(133,363)
Realized gains (losses)	(757,601)	(108,643)
Decrease in allowance for credit losses	(128,729)	(0)
Real Estate Loan [Member]
Decrease in allowance for credit losses	$ (128,729)	$ (0)