Note 11 - Stockholders' Deficit - Fair Value Options Weighted-Average Assumptions (Details) - Warrant To Acquire Common Stock [Member]	Dec. 31, 2021
Measurement Input, Expected Dividend Rate [Member]
Warrant measurement Input	0.000
Measurement Input, Price Volatility [Member]
Warrant measurement Input	0.870
Measurement Input, Risk Free Interest Rate [Member]
Warrant measurement Input	0.008
Measurement Input, Expected Term [Member]
Warrant measurement Input	5.31