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Inventories (Tables)
 12 Months Ended
Dec. 31, 2015
Inventory Disclosure [Abstract]  
Components of inventories
Inventories as of December 31, 2015 and 2014 include the costs of material, labor, and factory overhead. Inventories consist of the following:
 
December 31,
 
2015
 
2014
Raw materials
$
12,833

 
$
8,619

Work in process
2,778

 
2,896

Finished goods
5,978

 
5,909

 
$
21,589

 
$
17,424