Annual report pursuant to Section 13 and 15(d)

Inventories (Detail) - Schedule of Inventory, Current

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Inventories (Detail) - Schedule of Inventory, Current (USD $)
In Thousands, unless otherwise specified
Jul. 31, 2012
Jul. 31, 2011
Raw materials $ 1,283 $ 1,063
Work in process 2,821 2,517
Finished products 4,696 5,680
$ 8,800 $ 9,260