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Segment Reporting - Sales By Geographic Regions (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Aug. 31, 2014
Aug. 31, 2013
Aug. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]      
Sales Revenue, Goods, Net $ 42,302 $ 44,149 $ 40,301
North America
      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Sales Revenue, Goods, Net 37,947 39,918 37,503
South America
      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Sales Revenue, Goods, Net 2,119 2,511 1,444
Europe
      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Sales Revenue, Goods, Net 1,594 1,040 1,064
Asia Pacific [Member]
      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Sales Revenue, Goods, Net $ 642 $ 680 $ 290