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For an unclassified balance sheet, the amount due from customers or clients for goods or services that have been delivered or sold in the normal course of business, reduced to their estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 3

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

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-Subparagraph (SX 210.9-03.9)

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-Publisher FASB

-Name Accounting Standards Codification

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-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.5)

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- Definition

For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 4

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

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-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.4)

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Amount of contractual obligation, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments.

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No definition available.

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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No definition available.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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No definition available.

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The total amount due to the entity within one year of the balance sheet date (or one operating cycle, if longer) from outside sources, including trade accounts receivable, notes and loans receivable, as well as any other types of receivables, net of allowances established for the purpose of reducing such receivables to an amount that approximates their net realizable value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 3

-Subparagraph a

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

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-Subparagraph (SX 210.5-02.3,4)

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-Name Regulation S-X (SX)

-Number 210

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Description Of Business And Significant Accounting Policies (Narrative) (Details) (USD $)	12 Months Ended
	Aug. 31, 2014 segment	Aug. 31, 2013
Description Of Business And Significant Accounting Policies [Line Items]
Accounts receivable, current	$ 94,135,000	$ 120,291,000
Allowance for doubtful accounts	4,800,000	2,900,000
Number of reportable segments	2
Leased Barriers [Member]
Description Of Business And Significant Accounting Policies [Line Items]
Useful life	12 years
Maximum [Member] \| Leased Barrier Transfer Machines [Member]
Description Of Business And Significant Accounting Policies [Line Items]
Useful life	10 years
Maximum [Member] \| Building [Member]
Description Of Business And Significant Accounting Policies [Line Items]
Useful life	30 years
Maximum [Member] \| Equipment [Member]
Description Of Business And Significant Accounting Policies [Line Items]
Useful life	7 years
Maximum [Member] \| Other [Member]
Description Of Business And Significant Accounting Policies [Line Items]
Useful life	20 years
Minimum [Member] \| Leased Barrier Transfer Machines [Member]
Description Of Business And Significant Accounting Policies [Line Items]
Useful life	8 years
Minimum [Member] \| Building [Member]
Description Of Business And Significant Accounting Policies [Line Items]
Useful life	15 years
Minimum [Member] \| Equipment [Member]
Description Of Business And Significant Accounting Policies [Line Items]
Useful life	3 years
Minimum [Member] \| Other [Member]
Description Of Business And Significant Accounting Policies [Line Items]
Useful life	2 years
Iraq Contract Performance Bonds [Member]
Description Of Business And Significant Accounting Policies [Line Items]
Contractual Obligation	1,900,000
Performance bond obligations	1,900,000
Chinese Government Deliquent Accounts Receivable [Member]
Description Of Business And Significant Accounting Policies [Line Items]
Accounts receivable, current and long-term	8,000,000
Iraq Contract Accounts Receivable [Member]
Description Of Business And Significant Accounting Policies [Line Items]
Accounts receivable, current	$ 2,500,000