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Warranty reserve liability - Schedule of Product Warranty Liability (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2023
Jun. 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 2,160 1,991
Settlements of warranty claims (2,036) (2,667)
Ending Balance $ 8,436 8,722
Immaterial reclassifications   $ 500