Note 7 - Investments in Equity Securities - Schedule of Investments in Equity Securities (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Cost basis	$ 949,293		$ 949,293
Unrealized gain (loss) on equity securities	(28,093)		(28,093)
Fair value of equity securities	$ 921,200		$ 921,200