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Note 7 - Derivative Liabilities - Option Pricing Assumptions (Details) - Convertible Notes Payable Issued May 21, 2019 [Member]
Sep. 30, 2020
Measurement Input, Option Volatility [Member]  
Derivative liability, measurement input 0.76
Measurement Input, Risk Free Interest Rate [Member]  
Derivative liability, measurement input 0.0011
Measurement Input, Expected Dividend Rate [Member]  
Derivative liability, measurement input
Measurement Input, Expected Term [Member]  
Derivative liability, measurement input 0.5