Quarterly report pursuant to Section 13 or 15(d)

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

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Product Warranty Liability - Reconciliation of the Changes in Product Warranty Liability (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Guarantees [Abstract]        
Balance at beginning of period $ 504 $ 347 $ 653 $ 308
(Income) expense for product warranties (158) 436 (45) 573
Product warranty claims paid (11) (63) (273) (161)
Balance at end of period $ 335 $ 720 $ 335 $ 720