Registration statement for securities of certain foreign private issuers

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

v3.20.1
Share Capital - Summary of fair values at the amendment date of the share-based option plan (Detail)
 1 Months Ended 12 Months Ended
May 29, 2019
CAD ($)
yr
$ / shares
Dec. 31, 2019
CAD ($)
yr
Dec. 31, 2018
CAD ($)
Disclosure of fair value measurement of equity [line items]      
Expected Option Life | yr   3.5  
Before Amendment [Member]      
Disclosure of fair value measurement of equity [line items]      
Share price at grant | $ / shares $ 3.47    
Expected dividends    
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    
Bottom of range [member] | Before Amendment [Member]      
Disclosure of fair value measurement of equity [line items]      
Fair Value calculated $ 0.01    
Exercise price | $ / shares $ 12.90    
Expected Volatility 98.60%    
Expected Option Life | yr 1.0    
Risk free interest rate (based on government bonds) 1.48%    
Bottom of range [member] | After Amendment [Member]      
Disclosure of fair value measurement of equity [line items]      
Fair Value calculated $ 1.06    
Expected Volatility 98.60%    
Expected Option Life | yr 1.0    
Risk free interest rate (based on government bonds) 1.48%    
Top of range [member] | Before Amendment [Member]      
Disclosure of fair value measurement of equity [line items]      
Fair Value calculated $ 1.40    
Exercise price | $ / shares $ 51.60    
Expected Volatility 99.40%    
Expected Option Life | yr 3.5    
Risk free interest rate (based on government bonds) 1.57%    
Top of range [member] | After Amendment [Member]      
Disclosure of fair value measurement of equity [line items]      
Fair Value calculated $ 2.10    
Expected Volatility 99.40%    
Expected Option Life | yr 3.5    
Risk free interest rate (based on government bonds) 1.57%