v3.26.1
Share capital (Narrative) (Details)
$ / shares in Units, $ / shares in Units, $ in Thousands, $ in Millions
 1 Months Ended 12 Months Ended
Dec. 12, 2025
USD ($)
shares
Dec. 19, 2024
USD ($)
Dec. 04, 2024
$ / shares
Dec. 04, 2024
USD ($)
shares
Mar. 27, 2024
$ / shares
Mar. 27, 2024
USD ($)
shares
Oct. 01, 2019
USD ($)
Aug. 19, 2025
shares
Dec. 31, 2024
CAD ($)
Dec. 19, 2024
CAD ($)
Ounce
$ / shares
shares
Dec. 19, 2024
USD ($)
Ounce
shares
Dec. 31, 2025
USD ($)
$ / shares
shares
Dec. 31, 2025
USD ($)
$ / shares
shares
Dec. 31, 2024
USD ($)
$ / shares
shares
Disclosure of detailed information about business combination [line items]                            
Description of share consolidation                         2.5 pre-consolidated common shares for one post-consolidated common share  
Number of warrants issued           604,008                
Value of warrants issued | $           $ 100                
Exercise price of warrants issued | $ / shares         $ 0.75                  
Value of settlement | $                         $ 3,000  
Settlement of transaction-related payables, shares                         2,329,870  
Number of units granted           10,400,000                
Units issued, price per unit | $ / shares         0.75                  
Proceeds from issuance of units | $           $ 5,800                
Exercise price of warrants issued from unit | $ / shares         $ 1                  
Transaction costs | $           $ 800                
Issuances of common shares, shares           60,000                
Issuances of common shares, value | $           $ 100                
Shares reserved for issuance under stock option plan                         10.00%  
Stock option, term                         10 years  
Weighted average fair value at grant date | $ / shares                         $ 0.59 $ 0.45
Cash settled restricted share units outstanding                       0 0 93,630
Cash settled restricted share units outstanding, value | $                       $ 0 $ 0 $ 100
Share settled restricted share units outstanding                       9,469,438 9,469,438 0
Number of performance share units granted               1,140,730            
Vested expected life               3 years            
Deferred share units issued and outstanding                       3,213,599 3,213,599 1,425,166
Crescent Silver, LLC [Member]                            
Disclosure of detailed information about business combination [line items]                            
Shares issued for asset acquisition 11,137,558                          
Gross proceeds | $       $ 132,300                    
Shares issued, price per share | $ / shares     $ 5.54                      
Shares issued during period, shares       33,062,500                    
Cash consideration transferred in acquisition | $ $ 20,000                          
Galena Complex Acquisition [Member]                            
Disclosure of detailed information about business combination [line items]                            
Shares issued for asset acquisition                   68,000,000 68,000,000      
Acquisition of non-controlling interest   40.00%         40.00%              
Cash consideration transferred in acquisition | $   $ 10,000         $ 15,000       $ 10,000      
Monthly deliveries of silver | Ounce                   18,500 18,500      
Non-controlling interests | $   $ 18,300                 $ 18,300      
Private placements [Member]                            
Disclosure of detailed information about business combination [line items]                            
Gross proceeds | $                         $ 20,500 $ 9,400
Shares issued, price per share | (per share)                       $ 2.45   $ 1.18
Shares issued during period, shares                   50,000,000 50,000,000   11,664,016 11,245,046
Number of warrants issued                         1,044,000  
Value of warrants issued | $                         $ 600  
Exercise price of warrants issued | $ / shares                       $ 2.5    
Subscription receipts                 $ 50 $ 50 $ 35,100      
Share price for subscription receipts | $ / shares                   $ 1        
Bottom of range [Member]                            
Disclosure of detailed information about business combination [line items]                            
Percentage of directors fees awarded under deferred share unit plan                         50.00%  
Top of range [Member]                            
Disclosure of detailed information about business combination [line items]                            
Percentage of directors fees awarded under deferred share unit plan                         100.00%