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Inventories - Schedule of Inventory (Detail) (USD $) In Thousands, unless otherwise specified	Oct. 31, 2013	Jan. 31, 2013
Inventory Disclosure [Abstract]
Work-in-progress	$ 8,322	$ 3,012
Finished goods	4,688	5,906
Total	$ 13,010	$ 8,918

Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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