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Income taxes - Schedule of Income Before Income Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Income Tax Disclosure [Abstract]      
Canadian $ (188,462) $ (189,474) $ (146,322)
Foreign 10,867 (10,921) (27,707)
Loss before income tax $ (177,595) $ (200,395) $ (174,029)