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Note 7 - Goodwill (Tables)
 3 Months Ended
Mar. 31, 2018
Notes Tables  
Schedule of Goodwill [Table Text Block]
   
Engineering
    
Specialty
Health Care
    
Information
Technology
    
 
Total
  
                                 
Balance as of March 31, 2018 and December 30, 2017
   $
7,249
     $
2,398
     $
2,038
     $
11,685