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Note 10 - Asset Retirement Obligations (Tables)
 12 Months Ended
Aug. 29, 2015
Asset Retirement Obligation Disclosure [Abstract]  
Schedule of Asset Retirement Obligations [Table Text Block]
   

August 29,

2015

    

August 30,

2014

  

Beginning balance

   $ 11,675     $ 10,796  

Accretion expense

     690       941  

Effect of exchange rate changes

     (484

)

     (62

)

Change in estimate

     500       —  

Ending balance

   $ 12,381     $ 11,675