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Product Warranty Reserve - Roll Forward of Product Warranty Reserve (Detail) - Warranty Reserves [Member] - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Valuation and Qualifying Accounts Disclosure [Line Items]    
Beginning of period balance $ 1,282 $ 1,309
Additions charged to income 1,760 247
Warranty usage (244) (37)
Currency translation (61) (76)
End of period balance $ 2,737 $ 1,443