Note 2 - Investments - Realized Gains and Losses Related to the Sale of Securities (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Gross gains	$ 54,266	$ 650	$ 119,173	$ 4,601
Gross losses	(1,739)	(107)	(291,524)	(18,586)
Net security losses	52,527	543	(172,351)	(13,985)
Net security gains	$ 52,527	$ 543	$ (172,351)	$ (13,985)