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Note 5 - Inventory
 9 Months Ended
Sep. 30, 2017
Notes to Financial Statements  
Inventory Disclosure [Text Block]
NOTE
5.
INVENTORY
  
 
 
Inventory consisted of the following:
 
(in thousands)
  
September
30,
2017
    
December 31,
2016
  
Raw materials and supplies
   $
385
     $
514
  
Finished goods
    
353
      
555
  
Less allowance for excess and obsolete inventory and lower of cost or estimate net realizable value adjustments
    
(139
)
    
(196
)
Total inventory, net
   $
599
     $
873