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Significant Accounting Policies (Details) - Inventories (USD $)	Aug. 31, 2014	May 31, 2014
Inventories [Abstract]
Raw materials	$ 883,000	$ 899,000
Work in progress	732,000	635,000
Finished products	265,000	232,000
Total	$ 1,880,193	$ 1,765,772

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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