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Product Warranty Reserve - Roll Forward of Product Warranty Reserve (Detail) - Warranty Reserves [Member] - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Valuation and Qualifying Accounts Disclosure [Line Items]    
Beginning of period balance $ 1,282 $ 1,309
Additions charged to income 1,325 48
Warranty usage (244) (28)
Currency translation 0 (87)
End of period balance $ 2,363 $ 1,242