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 9 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Guarantees [Abstract]        
Balance at beginning of period $ 349 $ 301 $ 493 $ 538
Expense (income) for product warranties 76 22 87 (59)
Product warranty claims paid (15) (22) (170) (178)
Balance at end of period $ 410 $ 301 $ 410 $ 301