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Inventories (Tables)
12 Months Ended
Dec. 31, 2015
Inventories [Abstract]  
Schedule of inventories
 
December 31,
 
 
2015
  
2014
 
 
(in thousands)
 
Raw materials
$
1,418
  
$
1,588
 
Work in process
 
1,325
   
1,572
 
Finished goods
 
803
   
1,038
 
Total Inventories, net
$
3,546
  
$
4,198