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Note 6 - Acquisitions (Tables)
3 Months Ended
Mar. 28, 2020
Notes Tables  
Schedule of Business Acquisitions by Acquisition, Contingent Consideration [Table Text Block]
Fiscal Year Ending
 
Total
 
January 2, 2021 (after March 28, 2020)
  $
344
 
January 1, 2022
   
1,438
 
December 31, 2022
   
1,312
 
Estimated future contingent consideration payments
  $
3,094