Current report of foreign issuer pursuant to Rules 13a-16 and 15d-16 Amendments

Share Capital - Summary of Options Outstanding (Detail)

v3.19.3
Share Capital - Summary of Options Outstanding (Detail)
 9 Months Ended 12 Months Ended
Sep. 30, 2019
shares
$ / shares
Sep. 30, 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 1,715,079 1,715,079    
Canadian Dollar [Member]        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Number of Stock Options, Balance Beginning [1] 875,433 875,433 591,609 591,609
Number of Stock Options, Granted [1] 35,719 35,719 322,517 322,517
Number of Stock Options, Expired/Forfeited [1] (50,115) (50,115) (38,693) (38,693)
Number of Stock Options, Balance Ending [1] 861,037 861,037 875,433 875,433
Weighted-average Exercise Price, Balance Beginning | $ / shares [1]   $ 18.20   $ 21.30
Weighted-average Exercise Price, Granted | $ / shares [1]   4.54   13.51
Weighted-average Exercise Price, Expired/Forfeited | $ / shares [1]   31.66   24.90
Weighted-average Exercise Price, Balance Ending | $ / shares [1]   $ 5.92   $ 18.20
US Dollar [Member]        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Number of Stock Options, Balance Beginning [1] 50,349 50,349    
Number of Stock Options, Granted [1],[2] 843,693 843,693 50,349 50,349
Number of Stock Options, Expired/Forfeited [1] (40,000) (40,000)    
Number of Stock Options, Balance Ending [1] 854,042 854,042 50,349 50,349
Weighted-average Exercise Price, Balance Beginning | $ / shares [1] $ 1.55      
Weighted-average Exercise Price, Granted | $ / shares [1],[2] 2.72   $ 1.55  
Weighted-average Exercise Price, Expired/Forfeited | $ / shares [1] 3.72      
Weighted-average Exercise Price, Balance Ending | $ / shares [1] $ 2.65   $ 1.55  
[1] After giving consideration for 30:1 share consolidation effected June 2018.
[2] Certain options granted in the period ending September 30, 2019 will vest in accordance with vesting schedules and milestones over a period up to 4 years.