Quarterly report pursuant to Section 13 or 15(d)

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

v3.5.0.2
Product Warranty Liability - Reconciliation of the Changes in Product Warranty Liability (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Guarantees [Abstract]        
Balance at beginning of period $ 694 $ 632 $ 686 $ 653
(Income) expense for product warranties (54) 22 111 113
Product warranty claims paid (58) (150) (215) (262)
Balance at end of period $ 582 $ 504 $ 582 $ 504