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OTHER NON-CURRENT LIABILITIES (Tables)
 6 Months Ended
Jun. 30, 2017
Other Liabilities Disclosure [Abstract]  
Schedule of other non current liabilities
Other non-current liabilities consist of the following:
(in thousands)
 
June 30,
2017
 
December 31,
2016
 
 
 
 
 
Deferred revenue
 
$
4,276

 
$
5,680

Other non-current liabilities
 
4,630

 
4,800

 
 
 
 
 
Total
 
$
8,906

 
$
10,480