Note 9 - Derivative Liabilities - Option Pricing Assumptions (Details)	Dec. 31, 2019
Measurement Input, Option Volatility [Member]
Derivative liability, measurement input	3.5633
Measurement Input, Risk Free Interest Rate [Member]
Derivative liability, measurement input	0.0152
Measurement Input, Expected Dividend Rate [Member]
Derivative liability, measurement input
Measurement Input, Expected Term [Member]
Derivative liability, measurement input	0.5