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Note 3 - Revenue Recognition (Tables)
 6 Months Ended
Jun. 29, 2019
Notes Tables  
Disaggregation of Revenue [Table Text Block]
   
Thirteen Week
Periods Ended
    
Twenty-Six Week
Periods Ended
  
   
June 29,
2019
    
June 30,
2018
    
June 29,
2019
    
June 30,
2018
  
Engineering:
                                
Time and Material
   $
13,528
     $
19,220
     $
27,371
     $
38,460
  
Fixed Fee
    
5,098
      
2,351
      
10,267
      
4,528
  
Permanent Placement Services
    
(43
)
    
-
      
-
      
-
  
Total Engineering
   $
18,583
     $
21,571
     $
37,638
     $
42,988
  
                                 
Specialty Health Care:
                                
Time and Material
   $
23,140
     $
22,584
     $
47,046
     $
44,697
  
Permanent Placement Services
    
230
      
274
      
494
      
795
  
Total Specialty Health Care
   $
23,370
     $
22,858
     $
47,540
     $
45,492
  
                                 
Information Technology:
                                
Time and Material
   $
8,641
     $
7,281
     $
16,950
     $
13,950
  
Permanent Placement Services
    
111
      
-
      
172
      
92
  
Total Information Technology
   $
8,752
     $
7,281
     $
17,122
     $
14,042
  
    $
50,705
     $
51,710
     $
102,300
     $
102,522