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Discontinued operations - Additional Information (Details) - USD ($)
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Romania    
Disclosure of analysis of single amount of discontinued operations [line items]    
Cash flows from (used in) operating activities $ 414,000 $ (164,000)
Cash flows used in investing activities $ 0 33,000
Certej Project    
Disclosure of analysis of single amount of discontinued operations [line items]    
Sale of asset recognized as completed sale, period 1 year  
Impairment of property, plant and equipment   394,723,000
Impairment of proper, plant and equipment net of deferred tax   $ 374,684,000