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 6 Months Ended
May 29, 2019
USD ($)
yr
May 29, 2019
CAD ($)
yr
Jun. 30, 2019
USD ($)
yr
Jun. 30, 2018
USD ($)
yr
Jun. 30, 2018
CAD ($)
yr
Disclosure of fair value measurement of equity [line items]          
Fair Value at grant     $ 1.76   $ 5.99
Share price at grant     2.84   10.79
Exercise price     $ 3.40   $ 11.97
Expected Volatility     98.43% 90.12% 90.12%
Expected Option Life | yr     3.5 3 3
Expected dividends      
Risk free interest rate (based on government bonds)     1.61% 1.90% 1.90%
Before Amendment [Member]          
Disclosure of fair value measurement of equity [line items]          
Share price at grant   $ 3.47      
Expected dividends        
Before Amendment [Member] | Top of range [member]          
Disclosure of fair value measurement of equity [line items]          
Fair Value at grant   0.01      
Exercise price   $ 12.90      
Expected Volatility 98.60% 98.60%      
Expected Option Life | yr 1.0 1.0      
Risk free interest rate (based on government bonds) 1.48% 1.48%      
Before Amendment [Member] | Bottom of range [member]          
Disclosure of fair value measurement of equity [line items]          
Fair Value at grant   $ 1.40      
Exercise price   $ 51.60      
Expected Volatility 99.40% 99.40%      
Expected Option Life | yr 3.5 3.5      
Risk free interest rate (based on government bonds) 1.57% 1.57%      
After Amendment [Member]          
Disclosure of fair value measurement of equity [line items]          
Share price at grant   $ 3.47      
Exercise price   4.54      
Expected dividends        
After Amendment [Member] | Top of range [member]          
Disclosure of fair value measurement of equity [line items]          
Fair Value at grant   $ 1.06      
Expected Volatility 98.60% 98.60%      
Expected Option Life | yr 1.0 1.0      
Risk free interest rate (based on government bonds) 1.48% 1.48%      
After Amendment [Member] | Bottom of range [member]          
Disclosure of fair value measurement of equity [line items]          
Fair Value at grant   $ 2.10      
Expected Volatility 99.40% 99.40%      
Expected Option Life | yr 3.5 3.5      
Risk free interest rate (based on government bonds) 1.57% 1.57%