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Accounts Payable and Accrued Expenses - Schedule of Product Warranty Activity (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Payables And Accruals [Abstract]
Balance at beginning of period	$ 3,207	$ 2,709
Change in accruals for warranties during the period	2,839	1,717
Settlements during the period	(2,112)us-gaap_ProductWarrantyAccrualPayments	(1,219)us-gaap_ProductWarrantyAccrualPayments
Balance at end of period	$ 3,934	$ 3,207

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. For classified balance sheets, represents the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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