Note 9 - Stockholders' Equity - Assumptions Used to Estimate Fair Value (Details)	Feb. 28, 2018
Measurement Input, Expected Term [Member]
Measurement input	7
Measurement Input, Price Volatility [Member]
Measurement input	0.55
Measurement Input, Risk Free Interest Rate [Member]
Measurement input	0.02
Measurement Input, Expected Dividend Rate [Member]
Measurement input