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Note 5 - Inventory
9 Months Ended
Sep. 30, 2018
Notes to Financial Statements  
Inventory Disclosure [Text Block]
NOTE
5.
INVENTORY  
 
 
Inventory consisted of the following:
 
(in thousands)
 
September 30,
2018
   
December 31,
2017
 
Raw materials and supplies
  $
205
    $
298
 
Finished goods
   
309
     
346
 
Less allowance for excess and obsolete inventory and lower of cost or estimated net realizable value adjustments
   
(124
)
   
(140
)
Total inventory, net
  $
390
    $
504