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Note 4 - Stock-based Compensation (Tables)
9 Months Ended
Oct. 03, 2015
Notes Tables  
Schedule of Nonvested Share Activity [Table Text Block]
 
 
Restricted
 
 
 
 
 
 
 
Stock
 
 
Options
 
Outstanding, January 3, 2015
    419,679       714,451  
Granted
    106,278       71,517  
Vested
    204,741        
Exercised
          150,409  
Forfeited
    42,497       19,954  
Canceled or expired
          39,200  
Outstanding, October 3, 2015
    278,719       576,405