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Note 12 - Accumulated Other Comprehensive Loss (Tables)
 12 Months Ended
Nov. 24, 2018
Notes Tables  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Balance at November 26, 2016
   $
(2,553
 )
Recognition of prior service cost
    
(932
 )
Actuarial gains
    
448
  
Net pension amortization reclassified from accumulated other comprehensive loss
    
447
  
Tax effects
    
20
  
Balance at November 25, 2017
    
(2,570
 )
Reclassification of certain tax effects to retained earnings
(1)
    
(545
 )
Actuarial gains
    
616
  
Net pension amortization reclassified from accumulated other comprehensive loss
    
430
  
Tax effects
    
(269
 )
Balance at November 24, 2018
   $
(2,338
 )