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Note 7 - Goodwill (Tables)
6 Months Ended
Jun. 29, 2019
Notes Tables  
Schedule of Goodwill [Table Text Block]
   
Engineering
   
Specialty
Health Care
   
Information
Technology
   
 
Total
 
                                 
Balance as of June 29, 2019 and December 29, 2018
  $
13,096
    $
2,398
    $
2,038
    $
17,532