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Note 5 - Accounts Receivable (Tables)
6 Months Ended
May 28, 2016
Notes Tables  
Schedule Of Accounts Receivable [Table Text Block]
   
May 28, 2016
   
November 28, 2015
 
Gross accounts receivable
  $ 19,993     $ 22,372  
Allowance for doubtful accounts
    (1,006 )     (1,175 )
Accounts receivable, net
  $ 18,987     $ 21,197  
Schedule of Credit Losses for Financing Receivables, Current [Table Text Block]
   
2016
 
         
Balance at November 28, 2015
  $ 1,175  
Reductions to allowance
    (169 )
Balance at May 28, 2016
  $ 1,006