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Inventory (Details) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2012	May 31, 2012
Summary of inventory
Raw materials	$ 3,018	$ 3,529
Work in progress	1,035	937
Finished goods	21,929	20,520
Inventory, Net	$ 25,982	$ 24,986

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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