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Warranty reserve liability - Schedule of Product Warranty Liability (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward]    
Beginning balance as of December 31, 2022 and 2021 $ 8,312 $ 9,398
Provision for warranties 2,861 2,353
Settlements of warranty claims (2,958) (3,384)
Ending balance $ 8,215 8,367
Immaterial reclassifications   $ 600