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Note 2 - Inventories
9 Months Ended
Sep. 30, 2015
Notes to Financial Statements  
Inventory Disclosure [Text Block]
Note 2 – Inventories
 
Inventories consist of the following (expressed in thousands):
 
 
 
September 30,
 
 
December 31,
 
 
 
2015
 
 
2014
 
                 
Finished products
  $ 1,207     $ 1,628  
Work-in-process
    2,739       2,574  
Raw materials
    4,444       4,503  
    $ 8,390     $ 8,705