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Note 2 - Discontinued Operations (Tables)
 3 Months Ended
Mar. 31, 2018
Notes Tables  
Discontinued Operation, Income (Loss) from Discontinued Operation Disclosures [Table Text Block]
   
Three Months
Ended March 31,
2017
 
         
Net sales
   $
9
  
Cost of sales
    
394
  
Gross loss
    
(385
 )
Selling, general and administrative expense
    
-
  
Operating loss
    
(385
 )
Interest expense
    
-
  
Loss before income taxes
    
(385
 )
Income tax benefit
    
(59
 )
Net loss
   $
(326
 )