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Inventories (Details) (USD $) In Thousands, unless otherwise specified	Jan. 25, 2014	Apr. 27, 2013
Inventory Disclosure [Abstract]
Raw materials	$ 27,729	$ 20,979
Work-in-process	8,904	8,523
Finished goods	20,516	19,543
Inventories	$ 57,149	$ 49,045

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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