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Inventories (Details) (USD $) In Thousands, unless otherwise specified	May 31, 2013	May 31, 2012
Schedule of inventories
Raw materials	$ 5,104	$ 4,743
Work in process	2,863	2,543
Finished goods	765	1,073
Total inventories	$ 8,732	$ 8,359

X

- Definition

Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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