v3.26.1
Share-based payments - Additional Information (Detail)
 12 Months Ended
Dec. 22, 2025
USD ($)
shares
Dec. 08, 2025
shares
Nov. 28, 2025
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Nov. 03, 2025
shares
Sep. 03, 2025
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Jul. 25, 2025
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Jul. 20, 2025
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$ / shares
Jun. 27, 2025
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Jun. 05, 2025
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Jan. 24, 2025
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Jan. 06, 2025
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Dec. 23, 2024
Dec. 04, 2024
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Nov. 07, 2024
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Oct. 25, 2024
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Oct. 09, 2024
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Aug. 12, 2024
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Jul. 01, 2024
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Jun. 28, 2024
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Jun. 20, 2024
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Jun. 14, 2024
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May 23, 2024
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Mar. 28, 2024
Oct. 11, 2023
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May 14, 2023
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yr
$ / shares
May 11, 2023
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Sep. 16, 2022
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Aug. 15, 2022
Jul. 31, 2022
Mar. 31, 2022
Feb. 15, 2022
USD ($)
Aug. 09, 2019
USD ($)
Dec. 31, 2025
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$ / shares
Dec. 31, 2024
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$ / shares
Dec. 31, 2023
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$ / shares
Dec. 31, 2015
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Nov. 27, 2024
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Dec. 31, 2022
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Disclosure of terms and conditions of share-based payment arrangement [line items]                                                                            
Number of share options granted in share-based payment arrangement | shares                                                 1.902               0 0 12,500      
Exercise price, share options granted | $ / shares                                                 $ 16                   $ 16      
Expected dividend as percentage, share options granted                                                 0.00%                          
Expected volatility, share options granted                                                 51.00%                          
Risk free interest rate, share options granted                                                 2.94%                          
Option life, share options granted | yr                                                 5                          
Expense from share-based payment transactions                                                                     $ 95,100      
Number of share options exercised in share-based payment arrangement | shares                   10,000                                             10,000 489,166 330,750      
Weighted average exercise price of share options exercised in share-based payment arrangement | $ / shares                                                                 $ 4 $ 4.21 $ 7.55      
Proceeds from exercise of options                                                                 $ 40,000 $ 2,057,500 $ 2,497,500      
Number of share options expired in share-based payment arrangement | shares                                                                 828,125 53,334 0      
Number of share options forfeited in share-based payment arrangement | shares             828,125                                                   0 0 256,250      
Weighted average exercise price of share options forfeited in share-based payment arrangement | $ / shares                                                                 $ 0 $ 0 $ 15.85      
Percentage of common share issuance to diluted share capital                                                                 10.00%          
Number of other equity instruments exercised or vested in share-based payment arrangement | shares           125,000                                                                
Percentage of share option issued and oustanding capital at date of grant                                                                 10.00%          
Percentage of aggregate number of option granted                                                                 5.00%          
Weighted average unexercised price of share options forfeited in share-based payment arrangement | $ / shares             $ 9.72                                                     $ 15        
Consultant [Member]                                                                            
Disclosure of terms and conditions of share-based payment arrangement [line items]                                                                            
Percentage of share option granted                                                                 2.00%          
Employees [Member]                                                                            
Disclosure of terms and conditions of share-based payment arrangement [line items]                                                                            
Percentage of share option granted                                                                 2.00%          
Share options [member]                                                                            
Disclosure of terms and conditions of share-based payment arrangement [line items]                                                                            
Number of share options exercised in share-based payment arrangement | shares                                                                 10,000 489,166 330,750      
Weighted average exercise price of share options exercised in share-based payment arrangement | $ / shares                                                                   $ 4.21 $ 7.55      
Proceeds from exercise of options                                                                   $ 2,057,500 $ 2,497,500      
Deferred Stock Units [Member]                                                                            
Disclosure of terms and conditions of share-based payment arrangement [line items]                                                                            
Number of other equity instruments forfeited in share-based payment arrangement                                             75,000                   0 173,958 0 141,667    
Weighted average fair value at measurement date, share options granted $ 1.97               $ 1.69               $ 15   $ 16 $ 16   $ 16   $ 16   $ 16 $ 16       $ 16 $ 15       $ 10    
Expense from share-based payment transactions                                                                 $ 2,321,445 $ 11,100,686 $ 4,650,337      
Number of share options exercised in share-based payment arrangement | shares                                                                 962,500 173,958 25,000      
Number of share options forfeited in share-based payment arrangement                                                                   7,292        
Number of other equity instruments outstanding in share-based payment arrangement | shares                                                                 3,806,083 4,102,083 3,552,083     3,264,583
Number Of Other Equity Instruments Vested In Share based Payment Arrangement | shares                                                                 2,921,917     83,333    
Number of other equity instruments granted in share-based payment arrangement 367,500               299,000               250,000   56,250 187,500   312,500   87,500   225,000 1,250,000       862,500 125,000 666,500 806,250 312,500 1,675,000    
Number of other equity instruments exercised or vested in share-based payment arrangement       62,500 50,000 250,000           5,208               125,000 62,500   50,000 62,500     475,000   37,500 37,500   50,000 962,500 82,292 25,000 1,116,667    
Number of other equity instruments exercised in share based payment arrangement | shares                                                                       166,667    
Number of other equity instruments to be vested in share based payment arrangement | shares                                                                       416,666    
Number of other equity instruments expired in share-based payment arrangement                                                       506,250                    
Share-based Compensation Expenses Recovered Included In Exploration And Evaluation Assets                                                                 $ 5,044 $ 1,064,416 $ 127,607      
Expense from equity-settled share-based payment transactions                                                                 2,316,401 12,165,102 4,522,667      
Deferred Stock Units [Member] | Vesting In Four Installments [Member]                                                                            
Disclosure of terms and conditions of share-based payment arrangement [line items]                                                                            
Number of other equity instruments exercised or vested in share-based payment arrangement | shares                                               25,000                            
Deferred Stock Units [Member] | Yet To Vested [Member]                                                                            
Disclosure of terms and conditions of share-based payment arrangement [line items]                                                                            
Number of other equity instruments exercised or vested in share-based payment arrangement                                       62,500                                    
Deferred Stock Units [Member] | Immediately Vested [Member]                                                                            
Disclosure of terms and conditions of share-based payment arrangement [line items]                                                                            
Number of other equity instruments exercised or vested in share-based payment arrangement                                       12,500                                    
Deferred Stock Units [Member] | Four equal installments annually [Member]                                                                            
Disclosure of terms and conditions of share-based payment arrangement [line items]                                                                            
Number of other equity instruments exercised or vested in share-based payment arrangement                                       50,000                                    
Deferred Stock Units [Member] | December 31, 2015 [Member]                                                                            
Disclosure of terms and conditions of share-based payment arrangement [line items]                                                                            
Amortization expenses for share option                                                                 25,215 113,480 111,302      
Expense From Share based Payment Transactions                                                                 20,171 90,783 89.042      
Deferred Stock Units [Member] | August 9, 2019 [Member]                                                                            
Disclosure of terms and conditions of share-based payment arrangement [line items]                                                                            
Recovery of expenses capitalization to assets                                                                 0 1,087,113 105,410      
Deferred Stock Units [Member] | August 15, 2022 [Member]                                                                            
Disclosure of terms and conditions of share-based payment arrangement [line items]                                                                            
Amortization expenses for share option                                                                 38,468 499,340 1,674,489      
Deferred Stock Units [Member] | October 11 2023 [Member]                                                                            
Disclosure of terms and conditions of share-based payment arrangement [line items]                                                                            
Expense From Share based Payment Transactions                                                                   994,690 405,310      
Deferred Stock Units [Member] | May 23, 2024 [Member]                                                                            
Disclosure of terms and conditions of share-based payment arrangement [line items]                                                                            
Expense From Share based Payment Transactions                                                                 0 5,000,000        
Deferred Stock Units [Member] | June 20, 2024 [Member]                                                                            
Disclosure of terms and conditions of share-based payment arrangement [line items]                                                                            
Expense From Share based Payment Transactions                                                                 310,331 2,421,443        
Deferred Stock Units [Member] | June 28 2024 [Member]                                                                            
Disclosure of terms and conditions of share-based payment arrangement [line items]                                                                            
Expense From Share based Payment Transactions                                                                 0 900,000        
Deferred Stock Units [Member] | August 12, 2024 [Member]                                                                            
Disclosure of terms and conditions of share-based payment arrangement [line items]                                                                            
Expense From Share based Payment Transactions                                                                 1,417,724 2,258,846        
Deferred Stock Units [Member] | June 5, 2025 [Member]                                                                            
Disclosure of terms and conditions of share-based payment arrangement [line items]                                                                            
Expense From Share based Payment Transactions                                                                 505,310 0        
Deferred Stock Units [Member] | December 22, 2025 [Member]                                                                            
Disclosure of terms and conditions of share-based payment arrangement [line items]                                                                            
Expense From Share based Payment Transactions                                                                 24,397 0        
Deferred Stock Units [Member] | Exploration and evaluation assets [member]                                                                            
Disclosure of terms and conditions of share-based payment arrangement [line items]                                                                            
Share option capitalized                                                                 $ 5,044 $ 22,697 $ 22,260      
Restricted share units [member]                                                                            
Disclosure of terms and conditions of share-based payment arrangement [line items]                                                                            
Number of other equity instruments forfeited in share-based payment arrangement | shares     275,000                                                           275,000 0        
Weighted average fair value at measurement date, share options granted $ 1.97                   $ 8.24   $ 13.21   $ 15 $ 15 $ 15 $ 15                                     $ 15  
Number of share options exercised in share-based payment arrangement | shares                                                                 900,000 31,875 0      
Number of other equity instruments outstanding in share-based payment arrangement | shares                                                                 5,046,925 4,425,625 0      
Number Of Other Equity Instruments Vested In Share based Payment Arrangement | shares                                                                 3,664,750          
Number of other equity instruments granted in share-based payment arrangement | shares 1,285,300                   511,000   120,000 275,000 500,000 387,500 87,500 3,087,500                             1,796,300 4,457,500        
Number of other equity instruments exercised or vested in share-based payment arrangement | shares   50,000 100,000                                                           900,000 31,875        
Number of other equity instruments exercised in share based payment arrangement | shares   50,000           100,000               100,000                                 500,000          
Share-based Compensation Expenses Recovered Included In Exploration And Evaluation Assets                                                                 $ 835,576 $ 2,746,798        
Expense from equity-settled share-based payment transactions                                                                 $ 39,912,093 23,106,880        
Description of vesting requirements for share-based payment arrangement                                                                 100,000 vested immediately and the remaining 175,000 vest on the earlier of (i) the lock-up conditions related to an initial public offering lapsing: and (ii) one year from the completion of an initial public offering of the Company.          
Estimated fair value of grant                                                                 $ 19,875 0        
Restricted share units [member] | Immediately Vested [Member]                                                                            
Disclosure of terms and conditions of share-based payment arrangement [line items]                                                                            
Number of other equity instruments exercised or vested in share-based payment arrangement | shares                           100,000                                                
Restricted share units [member] | August 12, 2024 [Member]                                                                            
Disclosure of terms and conditions of share-based payment arrangement [line items]                                                                            
Expense From Share based Payment Transactions                                                                 911,534 400,966        
Restricted share units [member] | December 22, 2025 [Member]                                                                            
Disclosure of terms and conditions of share-based payment arrangement [line items]                                                                            
Expense From Share based Payment Transactions                                                                 131,005 0        
Expense from equity-settled share-based payment transactions                                                                 111,130 0        
Restricted share units [member] | July 1, 2024 [Member]                                                                            
Disclosure of terms and conditions of share-based payment arrangement [line items]                                                                            
Expense From Share based Payment Transactions                                                                 25,145,715 17,041,784        
Recovery of expenses capitalization to assets                                                                 95,833 2,345,832        
Expense from equity-settled share-based payment transactions                                                                 25,241,548 14,695,952        
Restricted share units [member] | October 9, 2024 [Member]                                                                            
Disclosure of terms and conditions of share-based payment arrangement [line items]                                                                            
Expense From Share based Payment Transactions                                                                 2,882,760 2,666,743        
Restricted share units [member] | October 25, 2024 [Member]                                                                            
Disclosure of terms and conditions of share-based payment arrangement [line items]                                                                            
Expense From Share based Payment Transactions                                                                 5,207,294 2,292,706        
Restricted share units [member] | November 7, 2024 [Member]                                                                            
Disclosure of terms and conditions of share-based payment arrangement [line items]                                                                            
Expense From Share based Payment Transactions                                                                 2,258,721 186,627        
Restricted share units [member] | December 4, 2024 [Member]                                                                            
Disclosure of terms and conditions of share-based payment arrangement [line items]                                                                            
Expense From Share based Payment Transactions                                                                 0 1,585,200        
Restricted share units [member] | December 31, 2025 [Member]                                                                            
Disclosure of terms and conditions of share-based payment arrangement [line items]                                                                            
Expense From Share based Payment Transactions                                                                 40,747,669 25,853,678        
Restricted share units [member] | January 6, 2025 [Member]                                                                            
Disclosure of terms and conditions of share-based payment arrangement [line items]                                                                            
Expense From Share based Payment Transactions                                                                 $ 4,210,640 $ 0        
Closing market price [Member]                                                                            
Disclosure of terms and conditions of share-based payment arrangement [line items]                                                                            
Weighted average exercise price of share options exercised in share-based payment arrangement | $ / shares                                                                 $ 5.72          
Proceeds from exercise of options                                                                 $ 40,000