Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Note 12 - Derivative Warrant Liabilities - Assumptions (Details)

v3.19.2
Note 12 - Derivative Warrant Liabilities - Assumptions (Details)
12 Months Ended
May 09, 2018
$ / shares
Dec. 27, 2017
$ / shares
Feb. 21, 2017
$ / shares
Mar. 31, 2019
CAD ($)
$ / shares
Mar. 31, 2019
USD ($)
$ / shares
Mar. 31, 2018
USD ($)
$ / shares
Feb. 28, 2017
USD ($)
$ / shares
Statement Line Items [Line Items]              
Exercise price (in CAD per share) | (per share) $ 1.31 $ 1.2625 $ 2.15        
Warrant liabilities issued May 2018 [member]              
Statement Line Items [Line Items]              
Exercise price (in CAD per share) | (per share)       $ 1.31    
Share price       $ 1.35    
Risk-free interest       1.52% 1.52%  
Estimated life (in years) (Year)       4 years 40 days 4 years 40 days  
Expected volatility       94.58% 94.58%  
Warrant liabilities issued December 27, 2017 [member]              
Statement Line Items [Line Items]              
Exercise price (in CAD per share) | $ / shares         $ 1.26   $ 1.26
Share price | $         $ 1.02   $ 1.02
Risk-free interest       2.23% 2.23%   2.56%
Estimated life (in years) (Year)       3 years 273 days 3 years 273 days   4 years 273 days
Expected volatility       107.57% 107.57%   95.15%
Warrant liabilities issued December 3, 2013 [member]              
Statement Line Items [Line Items]              
Exercise price (in CAD per share) | $ / shares           $ 1.50
Share price | $           $ 1.02
Risk-free interest         2.19%
Estimated life (in years) (Year)         248 days
Expected volatility         133.86%