Note 4 - Convertible Promissory Note - Assumptions (Details) - Convertible Debt [Member]	Jul. 23, 2019
Measurement Input, Share Price [Member]
Long-term Debt, Measurement Input	3.05
Measurement Input, Exercise Price [Member]
Long-term Debt, Measurement Input	1.8	[1]
Measurement Input, Risk Free Interest Rate [Member]
Long-term Debt, Measurement Input	0.018
Measurement Input, Expected Dividend Rate [Member]
Long-term Debt, Measurement Input
Measurement Input, Expected Term [Member]
Long-term Debt, Measurement Input	3.02
Measurement Input, Price Volatility [Member]
Long-term Debt, Measurement Input	0.93

[1] For the exercise price, the model inputs also accounted for the fair value protection under the Amended Note, which allows for the holder to convert at the lower of $1.80 share or 90% of the listed price of the stock on the day of conversion, whichever is lower (subject to a floor of $0.50).