Note 3 - Fair Value Measurements - Unobservable Inputs Assumptions (Details)	Dec. 31, 2021	Dec. 31, 2020
Measurement Input, Exercise Price [Member]
Derivative measurement input	0.4431	0.4431
Measurement Input, Expected Term [Member]
Derivative measurement input	6.00	6.00
Measurement Input, Price Volatility [Member]
Derivative measurement input	0.850	0.750
Measurement Input, Risk Free Interest Rate [Member]
Derivative measurement input	0.009	0.005
Measurement Input, Expected Dividend Rate [Member]
Derivative measurement input	0	0