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Concentration Risk (Narrative) (Details) - Sales Revenue, Goods, Net [Member] - Customer Concentration Risk [Member]
3 Months Ended
Nov. 26, 2016
Nov. 28, 2015
Major Customer One [Member]    
Concentration Risk [Line Items]    
Percent of revenue 13.70% 20.90%
Major Customer Two [Member]    
Concentration Risk [Line Items]    
Percent of revenue 14.20% 14.20%