Quarterly report pursuant to Section 13 or 15(d)

Product Warranty Liability - Reconciliation of the Changes in Product Warranty Liability (Detail)

v3.7.0.1
Product Warranty Liability - Reconciliation of the Changes in Product Warranty Liability (Detail) - USD ($)
$ in Thousands
3 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Guarantees [Abstract]    
Balance at beginning of period $ 538 $ 686
(Income) expense for product warranties (160) 166
Product warranty claims paid (87) (158)
Balance at end of period $ 291 $ 694