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Note 4 - Stock-based Compensation (Tables)
3 Months Ended
Apr. 04, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Nonvested Share Activity [Table Text Block]
   

Restricted

         
   

Stock

   

Options

 

Outstanding, January 3, 2015

    419,674       714,451  

Granted

    68,751       60,537  

Vested

    145,079        

Exercised

          115,574  

Forfeited

    23,517       12,394  

Canceled or expired

          39,200  

Outstanding, April 4, 2015

    319,829       607,820