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Note 6 - Acquisitions (Tables)
 12 Months Ended
Jan. 02, 2021
Notes Tables  
Schedule of Business Acquisitions by Acquisition, Contingent Consideration [Table Text Block]
Fiscal Year Ending
  
Total
  
January 1, 2022
    
500
  
December 31, 2022
    
2,358
  
Estimated future contingent consideration payments
   $
2,858
  
Balance as of December 29, 2018
   $ 4,773  
         
Contingent payments made
    
(598
)
Increase to contingent payment estimates
    
(1,178
)
Changes in fair value of contingent payments
    
61
  
         
Balance as of December 28, 2019
   $
3,058
  
         
Contingent payments made
    
(345
)
Changes in fair value of contingent consideration
    
145
  
         
Balance as of January 2, 2021
   $
2,858