Registration statement for securities of certain foreign private issuers

Share Capital - Summary of Options Outstanding (Detail)

v3.20.1
Share Capital - Summary of Options Outstanding (Detail)
 3 Months Ended 12 Months Ended
Mar. 31, 2020
shares
$ / shares
Mar. 31, 2020
shares
$ / shares
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 Beginning 1,714,421 1,714,421        
Number of Stock Options, Balance Ending 1,272,931 1,272,931 1,714,421 1,714,421    
US Dollar [Member]            
Disclosure of terms and conditions of share-based payment arrangement [line items]            
Number of Stock Options, Balance Beginning 854,042 [1] 854,042 [1] 50,349 50,349    
Number of Stock Options, Granted [1] [1] 843,693 843,693 50,349 50,349
Number of Stock Options, Expired/Forfeited (467,255) [1] (467,255) [1] (40,000) (40,000)    
Number of Stock Options, Balance Ending 386,787 [1] 386,787 [1] 854,042 [1] 854,042 [1] 50,349 50,349
Weighted-average Exercise Price, Balance Beginning | $ / shares   $ 2.65   $ 1.55    
Weighted-average Exercise Price, Granted | $ / shares     2.72   $ 1.55
Weighted-average Exercise Price, Expired/Forfeited | $ / shares   2.20   3.72    
Weighted-average Exercise Price, Balance Ending | $ / shares   $ 3.19   $ 2.65   $ 1.55
Canadian Dollar [Member]            
Disclosure of terms and conditions of share-based payment arrangement [line items]            
Number of Stock Options, Balance Beginning 860,379 [1] 860,379 [1] 875,433 875,433 591,609 591,609
Number of Stock Options, Granted 25,765 [1] 25,765 [1] 35,719 35,719 322,517 322,517
Number of Stock Options, Expired/Forfeited [1] [1] (50,773) (50,773) (38,693) (38,693)
Number of Stock Options, Balance Ending 886,144 [1] 886,144 [1] 860,379 [1] 860,379 [1] 875,433 875,433
Weighted-average Exercise Price, Balance Beginning | $ / shares $ 5.89   $ 18.20   $ 21.30  
Weighted-average Exercise Price, Granted | $ / shares 0.66   4.54   13.51  
Weighted-average Exercise Price, Expired/Forfeited | (per share)   31.79   24.90  
Weighted-average Exercise Price, Balance Ending | $ / shares $ 5.74   $ 5.89   $ 18.20  
[1] After giving consideration for 30:1 share consolidation effected June 20, 2018.