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Other non-current liabilities and employee future benefits - Included in Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Disclosure of net defined benefit liability (asset) [line items]    
Actuarial gain on defined benefit plans $ 970 $ 1,514 [1]
Net defined benefit pension plan liability    
Disclosure of net defined benefit liability (asset) [line items]    
Actuarial gain on defined benefit plans 973 1,546
Net other post-retirement benefit plan liability    
Disclosure of net defined benefit liability (asset) [line items]    
Actuarial gain on defined benefit plans $ (3) $ (32)
[1] Comparative information has been restated due to a discontinued operation (note 7).