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INVENTORIES
6 Months Ended
Jun. 30, 2018
Inventory Disclosure [Abstract]  
INVENTORIES
INVENTORIES
 
The components of inventories are as follows (in thousands):
 
June 30,
 
December 31,
 
2018
 
2017
Raw materials
$
16,070

 
$
16,500

Work-in-process
7,331

 
8,371

Finished goods
18,652

 
16,540

     Total
$
42,053

 
$
41,411