Note 3 - Investments - Realized Gains and Losses Related to the Sale of Securities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Gross gains	$ 530	$ 499,568
Gross losses	(5,029)	(69,003)
Net security gains (losses)	$ (4,499)	$ 430,565