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Note 12 - Accumulated Other Comprehensive Loss (Tables)
 12 Months Ended
Nov. 26, 2016
Notes Tables  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Balance at November 29, 2014
   $
(1,974
 )
Actuarial losses
    
(1,372
 )
Net pension amortization reclassified from accumulated other comprehensive loss
    
237
 
Tax effects
    
431
 
Balance at November 28, 2015
    
(2,678
 )
Actuarial losses
    
(165
 )
Net pension amortization reclassified from accumulated other comprehensive loss
    
366
 
Tax effects
    
(76
 )
Balance at November 26, 2016
   $
(2,553
 )