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Supplementary cash flow information (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Changes in non-cash working capital    
Accounts receivable and other $ (3,769) $ 14,065
Inventories (20,552) (15,667)
Accounts payable and accrued liabilities (3,993) (8,182)
Total $ (28,314) $ (9,784)