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

Share Capital - Summary of Weighted-Average Remaining Contractual Life and Weighted-Average Exercise Price Options Outstanding and Options Exercisable on Exercise Prices (Detail)

v3.19.3
Share Capital - Summary of Weighted-Average Remaining Contractual Life and Weighted-Average Exercise Price Options Outstanding and Options Exercisable on Exercise Prices (Detail)
Jun. 30, 2019
USD ($)
Years
Jun. 30, 2019
CAD ($)
Years
Dec. 31, 2018
Dec. 31, 2017
Canadian Dollar [Member]        
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]        
Options Outstanding, Number Outstanding [1] 843,688 843,688 875,433 591,609
Options Outstanding, Weighted-average remaining contractual life (years) 4.52 4.52    
Options Outstanding, Options Exercisable 360,526 360,526    
Canadian Dollar [Member] | $3.28 [member]        
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]        
Exercise prices/option | $   $ 3.28    
Options Outstanding, Number Outstanding 31,498 31,498    
Options Outstanding, Weighted-average remaining contractual life (years) 6.17 6.17    
Options Outstanding, Options Exercisable 31,498 31,498    
Canadian Dollar [Member] | $4.50 [member]        
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]        
Exercise prices/option | $   $ 4.50    
Options Outstanding, Number Outstanding 18,936 18,936    
Options Outstanding, Weighted-average remaining contractual life (years) 3.78 3.78    
Options Outstanding, Options Exercisable 18,936 18,936    
Canadian Dollar [Member] | $4.54 [member]        
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]        
Exercise prices/option | $   $ 4.54    
Options Outstanding, Number Outstanding 717,402 717,402    
Options Outstanding, Weighted-average remaining contractual life (years) 4.65 4.65    
Options Outstanding, Options Exercisable 245,831 245,831    
Canadian Dollar [Member] | $4.80 [member]        
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]        
Exercise prices/option | $   $ 4.80    
Options Outstanding, Number Outstanding 3,040 3,040    
Options Outstanding, Weighted-average remaining contractual life (years) 1.21 1.21    
Options Outstanding, Options Exercisable 3,040 3,040    
Canadian Dollar [Member] | $7.49 [member]        
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]        
Exercise prices/option | $   $ 7.49    
Options Outstanding, Number Outstanding 5,590 5,590    
Options Outstanding, Weighted-average remaining contractual life (years) 6.02 6.02    
Options Outstanding, Options Exercisable 5,590 5,590    
Canadian Dollar [Member] | $9.00 [member]        
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]        
Exercise prices/option | $   $ 9.00    
Options Outstanding, Number Outstanding 11,481 11,481    
Options Outstanding, Weighted-average remaining contractual life (years) 6.02 6.02    
Options Outstanding, Options Exercisable 11,481 11,481    
Canadian Dollar [Member] | $9.60 [member]        
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]        
Exercise prices/option | $   $ 9.60    
Options Outstanding, Number Outstanding 1,105 1,105    
Options Outstanding, Weighted-average remaining contractual life (years) 1.27 1.27    
Options Outstanding, Options Exercisable 1,105 1,105    
Canadian Dollar [Member] | $11.70 [member]        
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]        
Exercise prices/option | $   $ 11.70    
Options Outstanding, Number Outstanding 6,667 6,667    
Options Outstanding, Weighted-average remaining contractual life (years) 1.44 1.44    
Options Outstanding, Options Exercisable 6,667 6,667    
Canadian Dollar [Member] | $12.00 [member]        
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]        
Exercise prices/option | $   $ 12.00    
Options Outstanding, Number Outstanding 1,948 1,948    
Options Outstanding, Weighted-average remaining contractual life (years) 1.43 1.43    
Options Outstanding, Options Exercisable 1,948 1,948    
Canadian Dollar [Member] | $30.00 [member]        
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]        
Exercise prices/option | $   $ 30.00    
Options Outstanding, Number Outstanding 34,777 34,777    
Options Outstanding, Weighted-average remaining contractual life (years) 2.15 2.15    
Options Outstanding, Options Exercisable 23,185 23,185    
Canadian Dollar [Member] | $30.60 [member]        
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]        
Exercise prices/option | $   $ 30.60    
Options Outstanding, Number Outstanding 2,625 2,625    
Options Outstanding, Weighted-average remaining contractual life (years) 1.48 1.48    
Options Outstanding, Options Exercisable 2,625 2,625    
Canadian Dollar [Member] | $32.40 [member]        
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]        
Exercise prices/option | $   $ 32.40    
Options Outstanding, Number Outstanding 810 810    
Options Outstanding, Weighted-average remaining contractual life (years) 1.58 1.58    
Options Outstanding, Options Exercisable 810 810    
Canadian Dollar [Member] | $41.70 [member]        
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]        
Exercise prices/option | $   $ 41.70    
Options Outstanding, Number Outstanding 658 658    
Options Outstanding, Weighted-average remaining contractual life (years) 0.46 0.46    
Options Outstanding, Options Exercisable 658 658    
Canadian Dollar [Member] | $45.30 [member]        
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]        
Exercise prices/option | $   $ 45.30    
Options Outstanding, Number Outstanding 560 560    
Options Outstanding, Weighted-average remaining contractual life (years) 1.12 1.12    
Options Outstanding, Options Exercisable 560 560    
Canadian Dollar [Member] | $51.60 [member]        
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]        
Exercise prices/option | $   $ 51.60    
Options Outstanding, Number Outstanding 6,592 6,592    
Options Outstanding, Weighted-average remaining contractual life (years) 0.95 0.95    
Options Outstanding, Options Exercisable 6,592 6,592    
US Dollar [Member]        
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]        
Options Outstanding, Number Outstanding 343,349 343,349 50,349  
Options Outstanding, Weighted-average remaining contractual life (years) 5.71 5.71    
Options Outstanding, Options Exercisable 206,349 206,349    
US Dollar [Member] | $1.55 [member]        
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]        
Exercise prices/option | $ $ 1.55      
Options Outstanding, Number Outstanding 50,349 50,349    
Options Outstanding, Weighted-average remaining contractual life (years) 2.47 2.47    
Options Outstanding, Options Exercisable 50,349 50,349    
US Dollar [Member] | $3.72 [member]        
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]        
Exercise prices/option | $ $ 3.72      
Options Outstanding, Number Outstanding 40,000 40,000    
Options Outstanding, Weighted-average remaining contractual life (years) 2.63 2.63    
US Dollar [Member] | $3.40 [member]        
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]        
Exercise prices/option | $ $ 3.40      
Options Outstanding, Number Outstanding 253,000 253,000    
Options Outstanding, Weighted-average remaining contractual life (years) 6.84 6.84    
Options Outstanding, Options Exercisable 156,000 156,000    
[1] After giving consideration for 30:1 share consolidation effected June 2018.