Note 2 - Investments - Realized Gains and Losses Related to the Sale of Securities (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Gross gains	$ 1,900	$ 52,792
Gross losses	(2,541)	(395)
Realized gains (losses)	$ (641)	$ 52,397