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Note 7 - Goodwill (Tables)
6 Months Ended
Jun. 30, 2018
Notes Tables  
Schedule of Goodwill [Table Text Block]
   
Engineering
   
Specialty
Health Care
   
Information
Technology
   
 
Total
 
                                 
Balance as of June 30, 2018 and December 30, 2017
  $
7,249
    $
2,398
    $
2,038
    $
11,685