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Note 9 - Stockholders' Equity (Tables)
 12 Months Ended
Dec. 03, 2016
Notes Tables  
Schedule of Common Stock Outstanding Roll Forward [Table Text Block]
Common Shares Outstanding
 
2016
 
 
2015
 
 
2014
 
Beginning balance
 
 
50,074,310
 
    
50,310,803
     
50,228,543
 
Stock options exercised
 
 
593,891
 
    
275,035
     
330,179
 
Shares swapped for stock option exercises
 
 
(71,659
)
    
(39,883
 )    
-
 
Deferred compensation paid
 
 
7,235
 
    
8,852
     
9,957
 
Restricted units vested
 
 
105,552
 
    
83,494
     
69,624
 
Shares withheld for taxes
 
 
(67,807
)
    
(54,454
 )    
(67,593
 )
Restricted shares forfeited
 
 
(179
)
    
(9,537
 )    
(9,907
 )
Shares repurchased under repurchase program
 
 
(500,000
)
    
(500,000
 )    
(250,000
 )
Ending balance
 
 
50,141,343
 
    
50,074,310
     
50,310,803