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Commitments and Contingencies - Reconciliation of Changes in Accrued Warranty Costs (Detail) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Loss Contingency [Abstract]    
Balance at the beginning of the period $ 2,391 $ 4,596
Warranty claims paid (599) (1,624)
Warranty expense for products shipped during the current period 1,043 842
Adjustments to warranty estimates from prior periods (314) (942)
Adjustments due to currency translation (26) (20)
Balance at the end of the period $ 2,495 $ 2,852