Note 2 - Investments - Realized Gains and Losses Related to the Sale of Securities (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Gross gains	$ 1,264	$ 163,220	$ 3,164	$ 216,011
Gross losses	0	(3)	(2,541)	(398)
Realized gains	$ 1,264	$ 163,217	$ 623	$ 215,613