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Note 10 - Asset Retirement Obligations (Tables)
 12 Months Ended
Aug. 27, 2016
Notes Tables  
Schedule of Asset Retirement Obligations [Table Text Block]
 
 
August 27,
2016
 
 
August 29,
2015
 
Beginning balance
   $ 12,381     $ 11,675  
Accretion expense
     826       690  
Effect of exchange rate changes
     (69
)
     (484
)
Asset retirement liabilities settled
     (500
)
     —  
Change in estimate
     394       500  
Ending balance
   $ 13,032     $ 12,381