v3.26.1
Exploration and evaluation assets - Schedule of exploration and evaluation asset (Detail) - USD ($)
 12 Months Ended
Nov. 01, 2024
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Schedule of exploration and evaluation assets [Line Items]        
Balance, beginning of year   $ 141,055,466    
Share-based compensation (Note 14)   840,620 $ 1,682,382 $ 127,670
Balance, end of year   169,047,505 141,055,466  
Exploration and evaluation assets [member]        
Schedule of exploration and evaluation assets [Line Items]        
Balance, beginning of year   118,785,555 129,298,494  
Mineral rights and land fees   13,014 30,127  
Site operations, environmental, consulting and technical costs   11,037,467 4,885,615  
Share-based compensation (Note 14)   840,620 1,682,382  
Proceeds from royalty option agreement $ (1,000,000) 0 [1] (1,000,000) [1]  
Effect of foreign exchange   7,604,012 (16,111,063)  
Balance, end of year   $ 138,280,668 $ 118,785,555 $ 129,298,494
[1] On November 1, 2024, the Company and its Subsidiary entered into an option agreement (see Note 20) and received $1,000,000.