Quarterly report pursuant to Section 13 or 15(d)

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

v3.8.0.1
Product Warranty Liability - Reconciliation of the Changes in Product Warranty Liability (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Guarantees [Abstract]        
Balance at beginning of period $ 301 $ 582 $ 538 $ 686
Expense (income) for product warranties 22 (81) (59) 31
Product warranty claims paid (22) (4) (178) (220)
Balance at end of period $ 301 $ 497 $ 301 $ 497