Note 7 - Derivatives (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Agent Warrants In Connection With March 2020 Private Placement [Member]
Derivative Liability, Total	$ 40,157		$ 41,336
Derivative, Gain (Loss) on Derivative, Net, Total	1,190	$ (32,507)
Agent Warrants Issued In connection With May 2020 Offering [Member]
Derivative Liability, Total	42,139		42,645
Derivative, Gain (Loss) on Derivative, Net, Total	505	(31,320)
Agent Warrants In Connection With June 2020 Warrant [Member]
Derivative Liability, Total	45,285		$ 45,498
Derivative, Gain (Loss) on Derivative, Net, Total	$ 213	$ (34,710)