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Property, plant and equipment - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of detailed information about property, plant and equipment [line items]      
Additions to right-of-use assets $ 37 $ 3,094 $ 197
Office equipment      
Disclosure of detailed information about property, plant and equipment [line items]      
Lease term 5 years    
Bottom | Properties leased for own use      
Disclosure of detailed information about property, plant and equipment [line items]      
Lease term 2 years 2 years  
Top of range | Properties leased for own use      
Disclosure of detailed information about property, plant and equipment [line items]      
Lease term 5 years 5 years