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Note 3 - Revenue Recognition (Tables)
 3 Months Ended
Mar. 28, 2020
Notes Tables  
Disaggregation of Revenue [Table Text Block]
   
Thirteen Week Periods Ended
  
   
March 28,
2020
    
March 30,
2019
  
Engineering:
                
Time and Material
   $
12,827
     $
13,843
  
Fixed Fee
    
1,314
      
5,169
  
Permanent Placement Services
    
22
      
43
  
Total Engineering
   $
14,163
     $
19,055
  
                 
Specialty Health Care:
                
Time and Material
   $
22,053
     $
23,907
  
Permanent Placement Services
    
144
      
264
  
Total Specialty Health Care
   $
22,197
     $
24,171
  
                 
Information Technology:
                
Time and Material
   $
8,557
     $
8,308
  
Permanent Placement Services
    
116
      
61
  
Total Information Technology
   $
8,673
     $
8,369
  
    $
45,033
     $
51,595