Quarterly report pursuant to Section 13 or 15(d)

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

v3.10.0.1
Product Warranty Liability - Reconciliation of the Changes in Product Warranty Liability (Detail) - USD ($)
$ in Thousands
3 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Guarantees [Abstract]    
Balance at beginning of period $ 493 $ 538
Expense (income) for product warranties 48 (160)
Product warranty claims paid (49) (87)
Balance at end of period $ 492 $ 291