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

Note 17 - Share-based Payments - Option Activity (Details)

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Note 17 - Share-based Payments - Option Activity (Details)
 1 Months Ended 12 Months Ended 13 Months Ended
Mar. 31, 2017
CAD ($)
Mar. 31, 2019
CAD ($)
Mar. 31, 2018
CAD ($)
Feb. 28, 2017
CAD ($)
Mar. 31, 2017
CAD ($)
Feb. 08, 2017
CAD ($)
Feb. 29, 2016
CAD ($)
Statement Line Items [Line Items]              
Weighted average exercise price, outstanding $ 2.58 $ 1.25 $ 1.81 $ 2.59 $ 2.58 $ 2.59 $ 13.52
Outstanding at beginning of year 1,427,288 2,284,388 1,424,788 454,151 454,151    
Weighted average exercise price of share options granted in share-based payment arrangement $ 0.77 $ 1.75 $ 1.69 $ 1.69    
Number of share options granted in share-based payment arrangement 2,173,523 1,121,500 1,300,400 1,300,400    
Weighted average exercise price, exercised   $ 0.77        
Options, exercised   (4,167)        
Weighted average exercise price, forfeited $ 11.50 $ 1.84 $ 1.89 $ 13.29 $ 13.27    
Options, forfeited (2,500) (407,067) (199,800) (187,638) (190,138)    
Weighted average exercise price, expired $ 18.06 $ 15.38 $ 15.38    
Options, expired (62,100) (139,625) (139,625)    
Outstanding at end of year 1,424,788 4,046,677 2,284,388 1,427,288 1,424,788    
Exercisable at end of year $ 6.44 $ 1.56 $ 1.92 $ 6.49 $ 6.44    
Exercisable at end of year 238,482 1,613,200 591,113 240,982 238,482    
Corporation stock option plan [member]              
Statement Line Items [Line Items]              
Number of share options granted in share-based payment arrangement 0       0    
Options, exercised   (4,167) 0   0    
Weighted average fair value of the options granted to employees and directors of the Corporation $ 1.40 $ 0.51 $ 1.22 $ 1.40 $ 1.40