Annual report pursuant to Section 13 and 15(d)

Share Capital - Summary Of Option Activity (Detail)

v3.23.1
Share Capital - Summary Of Option Activity (Detail) - Stock Option [Member] - $ / shares
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Beginning balance outstanding 10,504,000 [1] 11,510,000
Granted units 7,877,000  
Exercised units 0  
Cancellations units (7,111,000)  
Forfeited/Expired units (3,152,000)  
Expirations units (241,000) (1,006,000)
Ending balance outstanding [1] 7,877,000 10,504,000
Weighted average exercise price beginning balance [2] $ 3.65 [1] $ 3.59
Weighted average exercise price granted [2] 0.05  
Weighted average exercise price Cancellations [2] 3.47  
Weighted average exercise price exercised [2]  
Weighted average exercise price forfeited/expired [2] 4.32  
Weighted average exercise price ending balance [1],[2] 0.05 3.65
Weighted average exercise price Expirations [2] $ 0.89 $ 2.92
Weighted average contractual life [1] 7 years 9 months 10 days 6 years 2 months 26 days
[1] As of December 31, 2022, 6,564 of the stock options outstanding were exercisable (December 31, 2021—9,922).
[2] The Original Awards are denominated in Canadian dollars. Exercise prices have been converted to U.S. dollar equivalents using an exchange rate of CAD$1.3544 to $1.00 as of December 31, 2022 and December 31, 2021.