Note 7 - Derivatives (Details Textual) - USD ($)	6 Months Ended
	Jun. 30, 2021	Mar. 01, 2021	Dec. 31, 2020
Agent Warrants In Connection With March 2020 Private Placement [Member]
Derivative Liability, Total	$ 76,903		$ 33,654
Derivative, Gain (Loss) on Derivative, Net, Total	(43,249)
Agent Warrants Issued In connection With May 2020 Offering [Member]
Derivative Liability, Total	33,819		74,873
Derivative, Gain (Loss) on Derivative, Net, Total	(41,054)
Agent Warrants In Connection With June 2020 Warrant [Member]
Derivative Liability, Total	32,701		77,844
Derivative, Gain (Loss) on Derivative, Net, Total	(45,143)
Promissory Note 2020 Conversion Feature [Member]
Derivative Liability, Total		$ 0	104,529
Derivative, Gain (Loss) on Derivative, Net, Total	104,529
Promissory Note 2019 Conversion Feature Agent Warrants [Member]
Derivative Liability, Total		$ 0	$ 89,680
Derivative, Gain (Loss) on Derivative, Net, Total	$ 89,680