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Note 5 - Property and Equipment (Tables)
 6 Months Ended
Jul. 01, 2017
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
July 1,
2017
    
December 31,
2016
  
Equipment and furniture
   $
878
     $
1,045
  
Computers and systems
    
5,847
      
5,521
  
Leasehold improvements
    
830
      
804
  
     
7,555
      
7,370
  
                 
Less: accumulated depreciation and amortization
    
3,726
      
3,318
  
                 
Property and equipment, net
   $
3,829
     $
4,052