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Segmented information (Details) - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Segmented information      
Other assets (non-current) $ 44,628 $ 36,994  
Property, plant and equipment 97,285 111,696  
Exploration and evaluation 70,135 55,126 $ 3,635
Revenues 31,625 64,046  
Cost of sales (32,292) (56,643)  
Other operating costs (28,560) (64,355)  
General and administrative (40,070) (36,837)  
Exploration and evaluation (1,769) (515)  
Impairment of assets (138,371) (140,000)  
Operating loss (209,437) (234,304)  
Evaluation and Development Assets      
Segmented information      
Other assets (non-current) 44,628 36,994  
Mining interest 451,695 580,479  
Property, plant and equipment 97,285 111,696  
Exploration and evaluation 70,135 55,126  
Total non-current assets 663,743 784,295  
Canada      
Segmented information      
Revenues 7,896 21,648  
Cost of sales (7,695) (21,648)  
Other operating costs (23,547) (52,914)  
General and administrative (29,701) (31,297)  
Exploration and evaluation (1,567) (515)  
Impairment of assets   (59,000)  
Operating loss (54,614) (143,726)  
Canada | Evaluation and Development Assets      
Segmented information      
Other assets (non-current) 15,794 16,252  
Mining interest 391,324 372,061  
Property, plant and equipment 61,012 63,655  
Exploration and evaluation 3,747 3,653  
Total non-current assets 471,877 455,621  
Mexico      
Segmented information      
Revenues 8,814 19,620  
Cost of sales (9,983) (19,620)  
Other operating costs (4,836) (11,423)  
General and administrative (2,040) (2,829)  
Exploration and evaluation (202)    
Impairment of assets 5,278 (81,000)  
Operating loss (2,969) (95,252)  
Mexico | Evaluation and Development Assets      
Segmented information      
Other assets (non-current) 20,728 17,485  
Mining interest 21,432 16,822  
Property, plant and equipment 13,479 21,688  
Total non-current assets 55,639 55,995  
USA      
Segmented information      
Revenues 14,915 22,778  
Cost of sales (14,614) (15,375)  
Other operating costs (177) (18)  
General and administrative (8,329) (2,711)  
Impairment of assets (143,649)    
Operating loss (151,854) 4,674  
USA | Evaluation and Development Assets      
Segmented information      
Other assets (non-current) 8,106 3,257  
Mining interest 38,939 191,596  
Property, plant and equipment 22,794 26,353  
Exploration and evaluation 66,388 51,473  
Total non-current assets $ 136,227 $ 272,679