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Inventories (Detail) (USD $) In Thousands, unless otherwise specified	Feb. 28, 2014	May 31, 2013
Inventory [Line Items]
Raw Materials	$ 22,258	$ 16,587
Work-in-process	4,002	3,583
Finished and purchased goods	25,601	18,145
Inventories	$ 51,861	$ 38,315

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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