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Note 5 - Accounts Receivable (Tables)
 3 Months Ended
Mar. 02, 2019
Notes Tables  
Schedule Of Accounts Receivable [Table Text Block]
   
March 2,
2019
    
November 24,
2018
  
Gross accounts receivable
   $
23,945
     $
19,809
  
Allowance for doubtful accounts
    
(723
 )    
(754
 )
Accounts receivable, net
   $
23,222
     $
19,055
  
Schedule of Credit Losses for Financing Receivables, Current [Table Text Block]
Balance at November 24, 2018
   $
754
  
Reductions to allowance
    
(31
 )
Balance at March 2, 2019
   $
723