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Inventories (Tables)
3 Months Ended
Mar. 31, 2016
Inventories [Abstract]  
Inventories
Inventories are comprised of the following (in thousands):

  
March 31, 2016
  
December 31, 2015
 
    
Raw materials
 
$
1,289
  
$
1,418
 
Work in process
  
1,505
   
1,325
 
Finished goods
  
756
   
803
 
Total Inventories, net
 
$
3,550
  
$
3,546