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Note 2 - Acquisitions (Tables)
 12 Months Ended
Aug. 27, 2016
Notes Tables  
Schedule of Business Acquisitions, by Acquisition [Table Text Block]
Year ended
 
August 27,
2016
 
 
August 29,
2015
 
 
August 30,
2014
 
Number of businesses acquired
     6       7       7  
Tangible assets acquired
   $ 3,572     $ 4,179     $ 949  
Intangible assets and goodwill acquired
     14,239       18,190       2,686  
Liabilities assumed
     (80
)
     (10
)
     —  
                         
Acquisition of businesses
   $ 17,731     $ 22,359     $ 3,635