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Investments and Fair Value Measurements (Narrative) (Details) - USD ($)
12 Months Ended
Aug. 29, 2015
Aug. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impairment of fixed asset $ 462,000  
Auction Rate Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities   $ 2,400,000