Note 2 - Investments - Realized Gains and Losses Related to the Sale of Securities (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Gross gains	$ 0	$ 1,264	$ 9,857	$ 3,164
Gross losses	(263,968)	0	(88,740)	(2,541)
Realized gains (losses)	(263,968)	1,264	(78,883)	623
Decrease in allowance for credit losses	(102,537)	(0)	(115,762)	(0)
Real Estate Loan [Member]
Decrease in allowance for credit losses	$ (102,537)	$ (0)	$ (115,762)	$ (0)