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Note 14 - Stockholders' Equity - The Key Assumptions Used to Value the Warrants (Details)
Sep. 30, 2022
Sep. 09, 2022
Sep. 08, 2022
Measurement Input, Price Volatility [Member] | The November 2021 Warrants [Member]      
Warrants assumptions 0.796 0.796 0.796
Measurement Input, Price Volatility [Member] | Amended July 2020 Warrants [Member]      
Warrants assumptions 0.796 0.796 0.796
Measurement Input, Expected Term [Member] | The November 2021 Warrants [Member]      
Warrants assumptions 6.0 6.0 5.4
Measurement Input, Expected Term [Member] | Amended July 2020 Warrants [Member]      
Warrants assumptions 3.3 3.4 3.4
Measurement Input, Risk Free Interest Rate [Member] | The November 2021 Warrants [Member]      
Warrants assumptions 0.0343 0.0343 0.0343
Measurement Input, Risk Free Interest Rate [Member] | Amended July 2020 Warrants [Member]      
Warrants assumptions 0.0358 0.0358 0.0358
Measurement Input, Expected Dividend Rate [Member] | The November 2021 Warrants [Member]      
Warrants assumptions 0.0000 0.0000 0.0000
Measurement Input, Expected Dividend Rate [Member] | Amended July 2020 Warrants [Member]      
Warrants assumptions 0.0000 0.0000 0.0000
Measurement Input, Share Price [Member] | The November 2021 Warrants [Member]      
Warrants assumptions 0.07 0.13 0.09
Measurement Input, Share Price [Member] | Amended July 2020 Warrants [Member]      
Warrants assumptions 0.05 0.10 0.02