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Commitments And Contingencies (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Aug. 31, 2017	Aug. 31, 2016	Aug. 31, 2015
Loss Contingencies [Line Items]
Rent expense	$ 2.1	$ 1.9	$ 2.1
Purchase Commitment [Member]
Loss Contingencies [Line Items]
Commitment outstanding	0.0
Indemnification Agreement 1 [Member]
Loss Contingencies [Line Items]
Liabilities related to indemnification agreement	0.0
Senior Officers And Directors [Member] | Indemnification Agreement 1 [Member]
Loss Contingencies [Line Items]
Liabilities related to indemnification agreement	$ 0.0

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- Definition

Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41499-112717

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Liabilities related to indemnification agreement.

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Purchase commitments amount outstanding.

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