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Property and Equipment - Schedule of Property and Equipment, Net (Detail) (USD $) In Thousands, unless otherwise specified	Feb. 28, 2013	Aug. 31, 2012
Property, Plant and Equipment [Line Items]
Machinery, equipment and vehicles	$ 12,639	$ 12,517
Buildings and improvements	3,532	3,574
Computer and office equipment	3,399	3,270
Software	5,720	5,530
Furniture and fixtures	1,239	1,229
Land	278	287
Subtotal	26,807	26,407
Less: accumulated depreciation and amortization	(18,317)	(17,344)
Total	$ 8,490	$ 9,063

X

- Definition

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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- Definition

Amount before accumulated depreciation of building structures held for productive use including addition, improvement, or renovation to the structure, including, but not limited to, interior masonry, interior flooring, electrical, and plumbing.

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The gross amount of capitalized computer software costs as of the balance sheet date.

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Gross amount, at the balance sheet date, of long-lived, depreciable assets commonly used in offices and stores. Examples include desks, chairs, and store fixtures.

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Carrying amount as of the balance sheet date of real estate held for productive use. This excludes land held for sale.

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Gross amount, as of the balance sheet date, of long-lived, depreciable assets used in the production process to produce goods and services.

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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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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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