Annual reports filed by certain Canadian issuers pursuant to Section 15(d) and Rule 15d-4

SHARE CAPITAL - Summary of Fair Values at the Amendment Date of the Share-Based Option Plan (Detail)

v3.21.1
SHARE CAPITAL - Summary of Fair Values at the Amendment Date of the Share-Based Option Plan (Detail)
 12 Months Ended
Dec. 31, 2020
USD ($)
yr
$ / shares
Dec. 31, 2020
CAD ($)
yr
$ / shares
Dec. 31, 2019
USD ($)
yr
$ / shares
Dec. 31, 2019
CAD ($)
yr
$ / shares
Canadian Dollar [Member]        
Disclosure of fair value measurement of equity [line items]        
Fair value at grant   $ 0.82   $ 1.61
Share price at grant   1.01   2.90
Exercise price   $ 1.04   $ 4.54
Expected option life | yr 4.0 4.0 3.4 3.4
Risk free interest rate 0.67% 0.67% 1.43% 1.43%
Expected volatility 145.61% 145.61% 98.10% 98.10%
Expected dividends | $    
US Dollar [Member]        
Disclosure of fair value measurement of equity [line items]        
Fair value at grant $ 0.89   $ 1.48  
Share price at grant 1.04   2.36  
Exercise price $ 1.07   $ 2.72  
Expected option life | yr 4.0 4.0 3.5 3.5
Risk free interest rate 0.29% 0.29% 1.50% 1.50%
Expected volatility 149.77% 149.77% 97.90% 97.90%
Expected dividends | $