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INVENTORIES (Tables)
 6 Months Ended
Jun. 30, 2016
Inventory Disclosure [Abstract]  
Schedule of inventory
Inventories, net consist of the following (in thousands):
 
 
December 31,
 
June 30,
 
 
2015
 
2016
Raw materials
 
$
8,531

 
$
10,097

Work in process
 
2,839

 
4,089

Finished goods
 
6,122

 
5,194

Allowance for excess or obsolete inventory
 
(1,391
)
 
(1,304
)
Total inventory
 
$
16,101

 
$
18,076