Note 10 - Convertible Note - Key Assumptions Used to Value the Combined Embedded Derivative (Details)	Mar. 31, 2020 yr	Dec. 31, 2019 yr	Mar. 26, 2019 yr
Measurement Input, Share Price [Member]
Derivative Liability, Measurement Input	0.0059	0.0065	0.0128
Measurement Input, Price Volatility [Member]
Derivative Liability, Measurement Input	1.992	1.926	0.938
Measurement Input, Risk Free Interest Rate [Member]
Derivative Liability, Measurement Input	0.0015	0.016	0.0234
Measurement Input, Expected Term [Member]
Derivative Liability, Measurement Input	0.49	0.74	1.5