v3.26.1
Other non-current assets - Narrative (Details) - USD ($)
$ in Thousands
1 Months Ended
May 31, 2026
Jun. 30, 2026
Dec. 31, 2025
Property, Plant, and Equipment [Line Items]      
Deposits   $ 25,242 $ 4,373
Santa Cruz Copper Project      
Property, Plant, and Equipment [Line Items]      
Deposits   9,800  
Tunnel Boring Machine      
Property, Plant, and Equipment [Line Items]      
Purchase price $ 64,700    
Period over which purchase price will be paid 2 years    
Deposits   $ 13,800