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Note 6 - Acquisitions (Tables)
3 Months Ended
Apr. 02, 2016
Notes Tables  
Schedule of Business Acquisitions by Acquisition, Contingent Consideration [Table Text Block]
Fiscal Year Ending
 
Total
 
December 31, 2016
  $ 787  
December 30, 2017
    665  
December 30, 2018
    313  
Estimated future contingent consideration payments
  $ 1,765