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Note 3 - Nonvested Restricted Stock Activity (Details) - $ / shares
3 Months Ended 12 Months Ended
Feb. 27, 2016
Nov. 28, 2015
Restricted Stock Units (RSUs) [Member]    
Nonvested (in shares) 237,013  
Granted (in shares) 203,668  
Vested (in shares) (99,135)  
Forfeited (in shares) (19,942)  
Nonvested (in shares) 321,604 237,013
Restricted Stock [Member]    
Nonvested (in shares) 110,160  
Granted (in shares)  
Vested (in shares) (68,737)  
Forfeited (in shares) (179)  
Nonvested (in shares) 41,244 110,160
Nonvested (in shares) 347,173  
Nonvested (in dollars per share) $ 42.17  
Nonvested 1 year 219 days 292 days
Granted (in shares) 203,668  
Granted (in dollars per share) $ 33.65  
Granted 2 years 36 days  
Vested (in shares) (167,872)  
Vested (in dollars per share) $ 41.88  
Forfeited (in shares) (20,121)  
Forfeited (in dollars per share) $ 38.11  
Forfeited 2 years 109 days  
Nonvested (in shares) 362,848 347,173
Nonvested (in dollars per share) $ 37.78 $ 42.17