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Inventories (Tables)
9 Months Ended
Sep. 30, 2015
Inventory Disclosure [Abstract]  
Components of inventories
Components of inventories consist of the following:

 
September 30,
2015
 
December 31,
2014
Raw materials
$
12,463

 
$
8,619

Work in process
3,827

 
2,896

Finished goods
4,903

 
5,909

 
$
21,193

 
$
17,424