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Note 3 - Revenue Recognition (Tables)
 9 Months Ended
Sep. 28, 2019
Notes Tables  
Disaggregation of Revenue [Table Text Block]
   
Thirteen Week
Periods Ended
    
Thirty-Nine Week
Periods Ended
  
   
September 28,
2019
    
September 29,
2018
    
September 28,
2019
    
September 29,
2018
  
Engineering:
                                
Time and Material
   $
13,938
     $
17,601
     $
41,309
     $
56,639
  
Fixed Fee
    
1,202
      
1,823
      
11,469
      
5,773
  
Permanent Placement Services
    
-
      
-
      
-
      
-
  
Total Engineering
   $
15,140
     $
19,424
     $
52,778
     $
62,412
  
                                 
Specialty Health Care:
                                
Time and Material
   $
16,272
     $
14,760
     $
63,318
     $
59,457
  
Permanent Placement Services
    
493
      
347
      
987
      
1,142
  
Total Specialty Health Care
   $
16,765
     $
15,107
     $
64,305
     $
60,599
  
                                 
Information Technology:
                                
Time and Material
   $
8,134
     $
7,925
     $
25,084
     $
21,875
  
Permanent Placement Services
    
211
      
103
      
383
      
195
  
Total Information Technology
   $
8,345
     $
8,028
     $
25,467
     $
22,070
  
    $
40,250
     $
42,559
     $
142,550
     $
145,081