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Note 11 - Discontinued Operations (Tables)
 12 Months Ended
Dec. 30, 2017
Notes Tables  
Disposal Groups, Including Discontinued Operations [Table Text Block]
   
December 30,
    
December 31,
    
December 26,
  
   
2017
    
2016
    
2015
  
Net sales
   $
-
     $
-
     $
6,965
  
                         
Loss from operations
   $
-
     $
-
     $
(1,963
 )
Loss from sale
    
(278
 )    
(221
 )    
(3,573
 )
Loss before taxes
    
(278
 )    
(221
 )    
(5,536
 )
Income tax provision
    
-
      
-
      
6
  
Loss, net of tax
   $
(278
 )   $
(221
 )   $
(5,542
 )