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INVENTORIES
 12 Months Ended
Dec. 31, 2017
Inventory Disclosure [Abstract]  
INVENTORIES
INVENTORIES
 
Net inventories consist of the following (in thousands):
 
December 31,
2017
 
December 31,
2016
Raw materials and purchased components
$
28,557

 
$
33,822

Work-in-process
33,355

 
31,799

Finished products
42,590

 
41,397

Inventories, net
$
104,502

 
$
107,018