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Note 7 - Goodwill (Tables)
 9 Months Ended
Sep. 28, 2019
Notes Tables  
Schedule of Goodwill [Table Text Block]
   
Engineering
    
Specialty
Health Care
    
Information
Technology
    
 
Total
  
Balance as of December 29, 2018
   $
13,096
     $
2,398
     $
2,038
     $
17,532
  
Adjustment to final TKE purchase price
    
(1,178
)
    
-
      
-
      
(1,178
)
Balance as of September 28, 2019
   $
11,918
     $
2,398
     $
,2038
     $
16,354