Note 13 - Quarterly Financial Information (Unaudited) - Summary of Quarterly Financial Information (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenue
Expenses and other items	(2,317,825)	(296,973)	(84,417)	(73,269)	(27,882)	(42,817)	(69,486)	(52,680)	(2,772,484)	(192,865)
Net loss	$ (2,317,825)	$ (296,973)	$ (84,417)	$ (73,269)	$ (27,882)	$ (42,817)	$ (69,486)	$ (52,680)	$ (2,772,484)	$ (192,865)	$ (183,279)
Net gain (loss) per common share – Basic and diluted (in dollars per share)	$ (0.04)								$ (0.04)