XML 63 R52.htm IDEA: XBRL DOCUMENT v3.7.0.1
Product Warranty Reserve - Roll Forward of Product Warranty Reserve (Detail) - Warranty Reserves [Member] - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Valuation and Qualifying Accounts Disclosure [Line Items]    
Beginning of period balance $ 1,058 $ 714
Additions charged to income 198 310
Warranty usage (118) (28)
Currency translation 63 (18)
End of period balance $ 1,201 $ 978