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Components of Inventories (Detail) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2015	Jul. 31, 2014
Inventory [Line Items]
Material and purchased components	$ 25,509	$ 22,394
Work-in-process	20,514	23,806
Finished equipment, including inventory consigned to customers	15,808	23,470
Total inventories	$ 61,831us-gaap_InventoryNet	$ 69,670us-gaap_InventoryNet

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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