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Share Capital - Additional Information (Detail)
$ / shares in Units, $ in Thousands, $ in Thousands
 12 Months Ended
Dec. 11, 2023
CAD ($)
shares
Dec. 09, 2023
CAD ($)
$ / shares
shares
Sep. 28, 2023
CAD ($)
shares
Sep. 22, 2023
CAD ($)
shares
Sep. 22, 2023
USD ($)
shares
Jun. 09, 2023
CAD ($)
shares
Dec. 09, 2022
CAD ($)
shares
Jun. 10, 2022
CAD ($)
shares
Dec. 31, 2023
CAD ($)
shares
Dec. 31, 2023
USD ($)
shares
Dec. 31, 2022
CAD ($)
shares
Jan. 06, 2023
CAD ($)
Disclosure of classes of share capital [line items]                        
Stock Issued During Period, Shares, Stock Options Exercised | shares                 8,608,816 8,608,816    
Proceeds from exercise of stock options                 $ 26,349      
Options exercised, shares | shares                     3,247,332  
Exercise of options                 (26,349)   $ (10,001)  
Common shares issued | shares 113,803         46,038 42,328 42,252        
Issue of shares on convertible debenture interest payment $ 1,064         $ 270 $ 235 $ 251 1,498   $ 486  
Percentage of issued and outstanding shares acquired                     20.00%  
Options granted, maximum term                     10 years  
Share-based payments (Note 12)                 $ 37,142   $ 35,146  
Equity Distribution Agreement At The Market Programme January Two Thousand And Twenty Three [Member]                        
Disclosure of classes of share capital [line items]                        
Proceeds from the issue of ordinary shares   $ 182,066                    
Payment for share issue costs   $ 6,890                    
Average share price | $ / shares   $ 7.36                    
Increase decrease in the shares issued during the period | shares   24,724,125                    
Common Stock Shares Subscribed But Not Issued Value                       $ 250,000
Equity Distribution Agreement At The Market Programme January Two Thousand And Twenty Three [Member] | Commission Fees [Member]                        
Disclosure of classes of share capital [line items]                        
Share issuance costs   $ 3,704                    
Equity Distribution Agreement At The Market Programme January Two Thousand And Twenty Three [Member] | Other Transaction Costs [Member]                        
Disclosure of classes of share capital [line items]                        
Share issuance costs   $ 3,186                    
Equity Distribution Agreement At The Market Programme December Two Thousand And Twenty Three [Member]                        
Disclosure of classes of share capital [line items]                        
Common Stock Shares Subscribed But Not Issued Value $ 500,000                      
2020 Debentures [member]                        
Disclosure of classes of share capital [line items]                        
Sale of stock issue price per share | shares     8,663,461                  
Stock issued during the period value conversion of debentures     $ 72,773                  
Stock issued during period related to accrued and unpaid interest | shares     19,522                  
Stock issued during period value related to accrued and unpaid interest     $ 164                  
2023 Debentures [member]                        
Disclosure of classes of share capital [line items]                        
Common shares issued | shares                 113,803 113,803    
Issue of shares on convertible debenture interest payment                 $ 1,064 $ 724    
Establishment fee (shares) | shares       634,615 634,615              
Establishment fee       $ 4,443 $ 3,300              
Included in exploration and evaluation assets [member]                        
Disclosure of classes of share capital [line items]                        
Capitalized to exploration and evaluation assets                 6,867   6,364  
Expensed to the statement of loss profit and comprehensive loss profit [member]                        
Disclosure of classes of share capital [line items]                        
Share-based payments (Note 12)                 37,142   35,146  
Reserves [member]                        
Disclosure of classes of share capital [line items]                        
Exercise of options                 16,288   6,260  
Expense from equity settled share based payment transactions                 $ 44,009   $ 41,510