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Reconciliation of Changes in Warranty Reserve (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Feb. 28, 2015	Feb. 28, 2014
Warranty Liability [Line Items]
Balance at beginning of year	$ 45	$ 43
Provision for current year sales	57	116
Warranty costs incurred	(79)us-gaap_ProductWarrantyAccrualPayments	(114)us-gaap_ProductWarrantyAccrualPayments
Balance at end of year	$ 23	$ 45

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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