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Note 3 - Inventories
6 Months Ended
Jun. 30, 2018
Notes to Financial Statements  
Inventory Disclosure [Text Block]
3.
Inventories (In thousands)
 
   
June
3
0
,
20
18
   
December 31,
20
17
 
                 
Inventories consist of:
               
Finished products
   
     
15
 
Net inventory
  $
     
15