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Note 4 - Discontinued Operations (Tables)
 12 Months Ended
Dec. 31, 2018
Notes Tables  
Discontinued Operation, Income (Loss) from Discontinued Operation Disclosures [Table Text Block]
   
Year Ended December 31,
 
   
2017
    
2016
  
                 
Net sales
   $
12
     $
6,869
  
Cost of sales
    
1,792
      
9,777
  
Gross loss
    
(1,780
 )    
(2,908
 )
Selling, general, and administrative expense
    
(1
 )    
257
  
Gain on sale of facility
    
(6
 )    
-
  
Operating loss
    
(1,773
 )    
(3,165
 )
Other expense
    
-
      
(1
 )
Interest expense
    
-
      
(14
 )
Loss before income taxes
    
(1,773
 )    
(3,180
 )
Income tax benefit
    
(2
 )    
(658
 )
Net loss
   $
(1,771
 )   $
(2,522
 )