Note 12 - Capital Stock - Share Purchase Warrants Assumptions (Details)	Oct. 03, 2018 yr	Jan. 20, 2017 yr
October 2018 Warrants [Member] | Measurement Input, Risk Free Interest Rate [Member]
Warrants, measurement input	0.029
October 2018 Warrants [Member] | Measurement Input, Price Volatility [Member]
Warrants, measurement input	0.633
October 2018 Warrants [Member] | Measurement Input, Expected Term [Member]
Warrants, measurement input	2.5
October 2018 Warrants [Member] | Measurement Input, Expected Dividend Rate [Member]
Warrants, measurement input	0
January 2017 Warrants [Member] | Measurement Input, Risk Free Interest Rate [Member]
Warrants, measurement input		0.015
January 2017 Warrants [Member] | Measurement Input, Price Volatility [Member]
Warrants, measurement input		0.7696
January 2017 Warrants [Member] | Measurement Input, Expected Term [Member]
Warrants, measurement input		3
January 2017 Warrants [Member] | Measurement Input, Expected Dividend Rate [Member]
Warrants, measurement input		0