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Inventories (Details) (USD $)	Jul. 31, 2013	Jul. 31, 2012
Inventories
Raw materials and parts	$ 23,815,000	$ 21,084,000
Work-in-process	6,945,000	6,476,000
Finished goods	23,407,000	19,195,000
Total	$ 54,167,000	$ 46,755,000

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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