v3.26.1
Financial assets and other receivables - Other financial assets (Details)
 12 Months Ended
Dec. 31, 2025
USD ($)
Dec. 31, 2022
USD ($)
Jan. 31, 2025
USD ($)
shares
Jan. 31, 2025
NOK (kr)
shares
Dec. 31, 2024
USD ($)
Apr. 30, 2024
USD ($)
Disclosure of financial assets [line items]            
Non current other financial assets $ 26,717,000       $ 19,744,000  
Other financial assets 26,717,000       19,744,000  
Current other financial assets 11,104,000       5,569,000  
Other current financial assets 11,104,000       5,569,000  
Other financial assets held with third parties 37,821,000       25,313,000  
Mo Industripark [member]            
Disclosure of financial assets [line items]            
Financial investments     $ 8,119,000 kr 91,360,000    
Number Of Shares Purchased. | shares     1,200 1,200    
Mo Industripark [member] | At fair value            
Disclosure of financial assets [line items]            
Financial investments 9,074,000          
Coreshell [member]            
Disclosure of financial assets [line items]            
Financial investments 7,000,000         $ 3,000,000
Coreshell [member] | At fair value            
Disclosure of financial assets [line items]            
Financial investments 11,100,000       5,500,000  
Equity securities            
Disclosure of financial assets [line items]            
Non current other financial assets 1,643,000       1,815,000  
Current other financial assets 4,000          
Other financial assets held with third parties 1,647,000       1,815,000  
Financial investments            
Disclosure of financial assets [line items]            
Non current other financial assets 9,074,000          
Current other financial assets 11,100,000       5,500,000  
Other financial assets held with third parties 20,174,000       5,500,000  
NMTC Program            
Disclosure of financial assets [line items]            
Grants received   $ 13,230,000        
Amortized cost | Selma Globe Investment Fund, LLC            
Disclosure of financial assets [line items]            
Other financial assets held with third parties 9,909,000          
Amortized cost | Other financial assets            
Disclosure of financial assets [line items]            
Non current other financial assets 12,921,000       12,929,000  
Other financial assets held with third parties $ 12,921,000       12,929,000  
Amortized cost | Other financial assets | FerroPem SAS            
Disclosure of financial assets [line items]            
Period for return of deposits 20 years          
Deposit given to the French government. $ 2,872,000       3,054,000  
Fair value through other comprehensive income - designated | Derivative financial instruments            
Disclosure of financial assets [line items]            
Non current other financial assets         293,000  
Other financial assets held with third parties         293,000  
Fair value through profit or loss - mandatorily measured | Derivative financial instruments            
Disclosure of financial assets [line items]            
Non current other financial assets 3,079,000       4,707,000  
Current other financial assets         69,000  
Other financial assets held with third parties $ 3,079,000       $ 4,776,000