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Commitments and Contingencies - Reconciliation of Changes in Accrued Warranty Costs (Detail) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Loss Contingency [Abstract]    
Balance at the beginning of the period $ 2,391 $ 4,596
Warranty claims paid (1,374) (1,777)
Warranty expense for products shipped during the current period 1,722 1,042
Adjustments to warranty estimates from prior periods 318 (1,194)
Adjustments due to currency translation (44) 19
Balance at the end of the period $ 3,013 $ 2,686