Note 7 - Embedded Derivatives Liabilities - Schedule of Inputs to Lattice Model Used to Value Embedded Derivatives (Details)	Jun. 30, 2020	Dec. 31, 2019
Measurement Input, Exercise Price [Member]
Embedded derivative liability, measurement input	0.79	2.31
Measurement Input, Conversion Rate, Per 1000 dollars [Member]
Embedded derivative liability, measurement input	409.5	67.95
Measurement Input, Conversion Price [Member]
Embedded derivative liability, measurement input	2.44	14.72
Measurement Input, Risk Free Interest Rate [Member]
Embedded derivative liability, measurement input	0.0017	0.0152
Measurement Input, Price Volatility [Member]
Embedded derivative liability, measurement input	0.92	0.6
Measurement Input, Entity Credit Risk [Member]
Embedded derivative liability, measurement input	0.38	0.27