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

Share Capital - Summary of fair values at the amendment date of the share-based option plan (Detail)

v3.19.3
Share Capital - Summary of fair values at the amendment date of the share-based option plan (Detail)
 1 Months Ended 9 Months Ended
May 29, 2019
CAD ($)
yr
$ / shares
Sep. 30, 2019
USD ($)
yr
$ / shares
Sep. 30, 2018
CAD ($)
yr
$ / shares
Disclosure of fair value measurement of equity [line items]      
Fair Value at grant   $ 1.48 $ 5.99
Share price at grant | (per share)   $ 2.39 $ 10.79
Exercise price | (per share)   $ 2.79 $ 11.97
Expected Volatility   98.02% 90.12%
Expected Option Life | yr   3.48 3
Expected dividends  
Risk free interest rate (based on government bonds)   1.50% 1.90%
Before Amendment [Member]      
Disclosure of fair value measurement of equity [line items]      
Share price at grant | $ / shares $ 3.47    
Expected dividends    
Before Amendment [Member] | Top of range [member]      
Disclosure of fair value measurement of equity [line items]      
Fair Value at grant $ 1.40    
Exercise price | $ / shares $ 51.60    
Expected Volatility 99.40%    
Expected Option Life | yr 350    
Risk free interest rate (based on government bonds) 1.57%    
Before Amendment [Member] | Bottom of range [member]      
Disclosure of fair value measurement of equity [line items]      
Fair Value at grant $ 0.01    
Exercise price | $ / shares $ 12.90    
Expected Volatility 98.60%    
Expected Option Life | yr 100    
Risk free interest rate (based on government bonds) 1.48%    
After Amendment [Member]      
Disclosure of fair value measurement of equity [line items]      
Share price at grant | $ / shares $ 3.47    
Exercise price | $ / shares $ 4.54    
Expected dividends    
After Amendment [Member] | Top of range [member]      
Disclosure of fair value measurement of equity [line items]      
Fair Value at grant $ 2.10    
Expected Volatility 99.40%    
Expected Option Life | yr 350    
Risk free interest rate (based on government bonds) 1.57%    
After Amendment [Member] | Bottom of range [member]      
Disclosure of fair value measurement of equity [line items]      
Fair Value at grant $ 1.06    
Expected Volatility 98.60%    
Expected Option Life | yr 100    
Risk free interest rate (based on government bonds) 1.48%