Note 7 - Embedded Derivatives - Schedule of Inputs to Lattice Model Used to Value Embedded Derivatives (Details)	Dec. 31, 2019	Dec. 31, 2018
Measurement Input, Exercise Price [Member]
Embedded derivative liability, measurement input	2.31	1.96
Measurement Input, Conversion Rate, Per 1000 dollars [Member]
Embedded derivative liability, measurement input	67.95	67.95
Measurement Input, Conversion Price [Member]
Embedded derivative liability, measurement input	14.72	14.72
Measurement Input, Maturity [Member]
Embedded derivative liability, measurement input	152,020	152,020
Measurement Input, Risk Free Interest Rate [Member]
Embedded derivative liability, measurement input	0.0152	0.0257
Measurement Input, Price Volatility [Member]
Embedded derivative liability, measurement input	0.6	1.5
Measurement Input, Entity Credit Risk [Member]
Embedded derivative liability, measurement input	0.27	0.31