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Concentration Risk (Narrative) (Details) - Sales Revenue, Goods, Net [Member] - Customer Concentration Risk [Member]
9 Months Ended
May 27, 2017
May 28, 2016
Major Customer One [Member]    
Concentration Risk [Line Items]    
Percent of revenue 10.90% 13.80%
Major Customer Two [Member]    
Concentration Risk [Line Items]    
Percent of revenue 10.60% 17.60%