Note 2 - Investments - Realized Gains and Losses Related to the Sale of Securities (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Gross gains	$ 4,542	$ 453	$ 14,399	$ 3,617
Gross losses	(144,746)	(16,364)	(233,486)	(18,905)
Realized gains (losses)	(140,204)	(15,911)	(219,087)	(15,288)
Decrease in allowance for credit losses	(0)	(0)	(115,762)	(0)
Real Estate Loan [Member]
Decrease in allowance for credit losses	$ (0)	$ (0)	$ (115,762)	$ (0)