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Equity - Authorized and Offerings (Details)
 12 Months Ended 84 Months Ended
Dec. 22, 2025
USD ($)
shares
Dec. 19, 2025
USD ($)
shares
Dec. 15, 2025
USD ($)
tranche
$ / shares
shares
Dec. 12, 2025
USD ($)
tranche
$ / shares
shares
Nov. 14, 2025
USD ($)
tranche
$ / shares
shares
Nov. 12, 2025
USD ($)
$ / shares
Oct. 28, 2025
USD ($)
$ / shares
shares
Oct. 27, 2025
USD ($)
tranche
$ / shares
shares
Jul. 14, 2025
USD ($)
Jun. 12, 2025
USD ($)
$ / shares
shares
Jun. 11, 2025
USD ($)
$ / shares
shares
Jun. 10, 2025
USD ($)
$ / shares
shares
Nov. 18, 2024
USD ($)
$ / shares
shares
May 12, 2023
USD ($)
shares
Dec. 31, 2025
USD ($)
$ / shares
shares
Dec. 31, 2024
USD ($)
shares
Dec. 31, 2025
$ / shares
shares
Oct. 24, 2025
$ / shares
Mar. 08, 2021
shares
Equity                                      
Common stock, shares authorized (unlimited)                             Unlimited        
Common stock, no par value | $ / shares                             $ 0   $ 0    
Shares Issued to Stibnite Foundation                             $ 3,954,000        
Proceeds from sale of common shares, net of issuance costs (Note 5)                             $ 841,800,000 $ 43,592,000      
Exercise price per warrant | $ / shares                             $ 35.59   $ 35.59    
Stibnite Foundation | Related Party                                      
Equity                                      
Shares Issued to Stibnite Foundation   $ 3,954,000                         $ 4,000,000 $ 0      
Shares Issued to Stibnite Foundation (in shares) | shares   150,000                         150,000   300,000    
ATM offering                                      
Equity                                      
Shares sold through offering, net of costs (in shares) | shares                           1,834,104          
Share issuance costs                           $ 600,000          
Net proceeds from stock issuance                           10,400,000          
Offering 2024                                      
Equity                                      
Shares sold through offering, net of costs (in shares) | shares                       7,575,757 3,439,465            
Price per share | $ / shares                         $ 10.17            
Proceeds from sale of common shares, net of issuance costs (Note 5)                         $ 33,200,000            
Share issuance costs                         $ 1,800,000            
Additional Shares Granted to Underwriters, Shares | shares                         515,919            
Additional Share Subscription, Threshold Days                         30 days            
2025 Offering                                      
Equity                                      
Common stock, no par value | $ / shares                     $ 0                
Shares sold through offering, net of costs (in shares) | shares                   24,622,000 22,728,000                
Price per share | $ / shares                   $ 13.2 $ 13.2                
Proceeds from sale of common shares, net of issuance costs (Note 5)                 $ 13,200,000                    
Private placement                                      
Equity                                      
Common stock, no par value | $ / shares     $ 0   $ 0 $ 0   $ 0       $ 0              
Shares sold through offering, net of costs (in shares) | shares       1,000,000 1,000,000   280,415 10,944,205   3,693,300                  
Price per share | $ / shares     $ 28.84       $ 24.25 $ 23.3                   $ 23.3  
Proceeds from sale of common shares, net of issuance costs (Note 5)         $ 24,300,000   $ 6,800,000 $ 255,000,000   $ 2,000,000   $ 100,000,000              
Share issuance costs             71,200,000                        
Net proceeds from stock issuance             $ 67,900,000                        
Sale of stock, aggregate offering, amount     $ 4,000,000 $ 28,800,000   $ 28,840,000         $ 100,000,000                
Number of tranches | tranche     2                                
Sale of stock, number of shares issued in transaction | shares     138,696                                
Private placement | Common share purchase warrants                                      
Equity                                      
Number of share purchase warrants exercisable | shares       370,000       4,053,408                      
Number of tranches | tranche       3 3     3                      
Threshold closing price of the common shares percentage               130.00%                      
Private placement | Common share purchase warrants | Warrants exercised in year one                                      
Equity                                      
Warrants premium pricing level, years       1 year 1 year     1 year                      
Exercise price per warrant | $ / shares       $ 38.93 $ 31.46     $ 31.46                      
Private placement | Common share purchase warrants | Warrants exercised in year two                                      
Equity                                      
Warrants premium pricing level, years       2 years 2 years     2 years                      
Exercise price per warrant | $ / shares       $ 43.26 $ 34.95     $ 34.95                      
Private placement | Common share purchase warrants | Warrants exercised in year three                                      
Equity                                      
Warrants premium pricing level, years       3 years 3 years     3 years                      
Exercise price per warrant | $ / shares       $ 47.59 $ 38.45     $ 38.45                      
Private placement | Agnico Eagle Mines Limited                                      
Equity                                      
Shares sold through offering, net of costs (in shares) | shares               7,725,321                      
Private placement | JP Morgan Chase                                      
Equity                                      
Proceeds from sale of common shares, net of issuance costs (Note 5)               $ 3,218,884                      
Tranche one                                      
Equity                                      
Proceeds from sale of common shares, net of issuance costs (Note 5) $ 2,000,000                                    
Sale of stock, number of shares issued in transaction | shares 69,348     69,348                              
Public offering and private placement | BMO Capital Markets Corp                                      
Equity                                      
Gross proceeds of private placement                       $ 474,000,000              
Public offering | BMO Capital Markets Corp                                      
Equity                                      
Shares sold through offering, net of costs (in shares) | shares             2,938,000                        
Maximum | ATM offering                                      
Equity                                      
Common shares aggregate gross offering price                           $ 20,000,000          
Omnibus Equity Incentive Plan | Maximum                                      
Equity                                      
Maximum number of shares available for grant | shares                                     8,280,530
Common Shares                                      
Equity                                      
Shares Issued to Stibnite Foundation                             $ 3,954,000        
Shares Issued to Stibnite Foundation (in shares) | shares                             150,000        
Shares sold through offering, net of costs (in shares) | shares                             52,123,025 5,273,569      
Common Shares | Private placement                                      
Equity                                      
Price per share | $ / shares                   $ 46.8                  
First preferred shares                                      
Equity                                      
Preferred stock, shares authorized (unlimited)                             Unlimited        
Preferred stock, no par value | $ / shares                             $ 0   $ 0    
Second preferred shares                                      
Equity                                      
Preferred stock, shares authorized (unlimited)                             Unlimited        
Preferred stock, no par value | $ / shares                             $ 0   $ 0