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Inventories
12 Months Ended
Dec. 31, 2017
Inventory Disclosure [Abstract]  
Inventories
INVENTORIES
Our major classes of inventories were as follows as of December 31, 2017 and 2016 (in thousands):
 
December 31,
 
2017
 
2016
Raw materials
$
12,418

 
$
14,382

Work in process
4,146

 
3,924

Finished goods
20,792

 
18,952

Total inventories
$
37,356

 
$
37,258