Note 3 - Fair Value Measurements - Unobservable Inputs Assumptions (Details)	Jun. 30, 2022	Dec. 31, 2021
Measurement Input, Exercise Price [Member]
Derivative measurement input	0.4431	0.4431
Measurement Input, Expected Term [Member]
Derivative measurement input	1.82	2.32
Measurement Input, Price Volatility [Member]
Derivative measurement input	1.000	0.900
Measurement Input, Risk Free Interest Rate [Member]
Derivative measurement input	0.029	0.008
Measurement Input, Expected Dividend Rate [Member]
Derivative measurement input	0	0