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Inventories (Tables)
3 Months Ended
Mar. 31, 2016
Inventory Disclosure [Abstract]  
Components of inventories
Components of inventories consist of the following:

 
March 31,
2016
 
December 31,
2015
Raw materials
$
13,605

 
$
12,833

Work in process
2,383

 
2,778

Finished goods
7,166

 
5,978

 
$
23,154

 
$
21,589