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Segment Reporting - Sales By Geographic Regions (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2013	Aug. 31, 2012	Aug. 31, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales by geographic regions	$ 44,149	$ 40,301	$ 36,636
North America
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales by geographic regions	39,918	37,503	35,287
South America
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales by geographic regions	2,511	1,444	1,066
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales by geographic regions	1,040	1,064	277
Asia
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales by geographic regions	$ 680	$ 290	$ 6

X

- Definition

Revenues from external customers attributed to all foreign countries in total from which the entity derives revenues.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 280

-SubTopic 10

-Section 50

-Paragraph 41

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599



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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 131

-Paragraph 38

-Subparagraph a(2)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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