Property and Equipment - Property and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2012	Jul. 31, 2011
Property, Plant and Equipment [Line Items]
Property plant and equipment	$ 78,496	$ 80,529
Less accumulated depreciation	(74,220)	(74,551)
Total	4,276	5,978
Computer Software And Equipment [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment	69,517	69,690
Land [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment	3,000	3,000
Furniture And Office Equipment [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment	775	1,856
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment	$ 5,204	$ 5,983

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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Gross amount of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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