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

Share Capital - Summary of Options Outstanding (Detail)

v3.20.1
Share Capital - Summary of Options Outstanding (Detail)
 12 Months Ended
Dec. 31, 2019
shares
$ / shares
Dec. 31, 2019
shares
$ / shares
Dec. 31, 2018
shares
$ / shares
Dec. 31, 2018
shares
$ / shares
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Number of Stock Options, Balance Ending 1,714,421 1,714,421    
Canadian Dollar [Member]        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Number of Stock Options, Balance Beginning 875,433 875,433 591,609 591,609
Number of Stock Options, Granted 35,719 35,719 322,517 322,517
Number of Stock Options, Expired/Forfeited (50,773) (50,773) (38,693) (38,693)
Number of Stock Options, Balance Ending 860,379 860,379 875,433 875,433
Weighted-average Exercise Price, Balance Beginning | $ / shares $ 18.20   $ 21.30  
Weighted-average Exercise Price, Granted | $ / shares 4.54   13.51  
Weighted-average Exercise Price, Expired/Forfeited | $ / shares 31.79   24.90  
Weighted-average Exercise Price, Balance Ending | $ / shares $ 5.89   $ 18.20  
US Dollar [Member]        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Number of Stock Options, Balance Beginning 50,349 50,349    
Number of Stock Options, Granted 843,693 843,693 50,349 50,349
Number of Stock Options, Expired/Forfeited (40,000) (40,000)    
Number of Stock Options, Balance Ending 854,042 854,042 50,349 50,349
Weighted-average Exercise Price, Balance Beginning | $ / shares   $ 1.55    
Weighted-average Exercise Price, Granted | $ / shares   2.72   $ 1.55
Weighted-average Exercise Price, Expired/Forfeited | $ / shares   3.72    
Weighted-average Exercise Price, Balance Ending | $ / shares   $ 2.65   $ 1.55