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Note 21 - Quarterly Results of Operations (unaudited) (Tables)
 12 Months Ended
Nov. 24, 2012
Schedule of Quarterly Financial Information [Table Text Block]
   
2012
 
   
First Quarter
 (1)
 
Second
Quarter (2)
 
Third Quarter
(3)
 
Fourth
 Quarter (4)
 
                         
Net sales
  $ 60,968     $ 67,454     $ 64,438     $ 76,812  
Gross profit
    31,671       35,661       33,818       40,172  
Net income (loss)
    (596 )     8,042       2,371       16,896  
Basic earnings (loss) per share
    (0.05 )     0.72       0.22       1.57  
Diluted earnings (loss) per share
    (0.05 )     0.71       0.21       1.55  
    2011  
   
First Quarter
 (5)
 
Second
 Quarter (6)
 
Third Quarter
(7)
 
Fourth
 Quarter (8)
 
                                 
Net sales
  $ 64,264     $ 66,261     $ 59,417     $ 63,266  
Gross profit
    31,848       33,197       29,251       33,270  
Net income (loss)
    (8,255 )     62,546       417       633  
Basic earnings (loss) per share
    (0.72 )     5.43       0.04       0.06  
Diluted earnings (loss) per share
    (0.72 )     5.39       0.04       0.06