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Accounts Payable and Accrued Expenses - Schedule of Product Warranty Activity (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Product Warranties Disclosures [Abstract]    
Balance at beginning of period $ 3,934 $ 3,207
Change in accruals for warranties during the period 1,865 2,839
Settlements during the period (2,198) (2,112)
Balance at end of period $ 3,601 $ 3,934