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Inventories (Tables)
6 Months Ended
Jun. 30, 2014
Inventory Disclosure [Abstract]  
Components of inventories
Components of inventories consist of the following:

 
June 30,
2014
 
December 31,
2013
Raw materials
$
10,287

 
$
9,783

Work in process
3,865

 
3,087

Finished goods
5,959

 
5,385

 
$
20,111

 
$
18,255