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Note 5 - Property and Equipment (Tables)
 9 Months Ended
Sep. 26, 2020
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
September 26,
2020
    
December 28,
2019
  
Computers and systems
   $
4,635
     $
5,628
  
Equipment and furniture
    
264
      
319
  
Leasehold improvements
    
226
      
308
  
     
5,125
      
6,255
  
                 
Less: accumulated depreciation and amortization
    
2,766
      
3,538
  
                 
Property and equipment, net
   $
2,359
     $
2,717