Note 8 - Derivatives (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Agent Warrants In Connection With March 2020 Private Placement [Member]
Derivative Liability	$ 135	$ 3,355
Derivative, Gain (Loss) on Derivative, Net	3,220	37,981
Agent Warrants Issued in Connection with May 2020 Offering [Member]
Derivative Liability	333	4,479
Derivative, Gain (Loss) on Derivative, Net	4,146	38,167
Agent Warrants In Connection With June 2020 Warrant [Member]
Derivative Liability	908	5,999
Derivative, Gain (Loss) on Derivative, Net	$ 5,091	$ 39,499