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REVENUE RECOGNITION AND CONTRACT WITH CUSTOMERS (Tables)
 6 Months Ended
Jun. 30, 2018
Revenue from Contract with Customer [Abstract]  
Schedule of New Accounting Pronouncements and Changes in Accounting Principles
 
Balance at December 31,
 2017
 
New Revenue Standard Adjustment
 
Balance at January 1,
2018
Liabilities
 
 
 
 
 
Deferred revenue
$
2,474

 
$
(2,474
)
 
$
—

Equity
 
 
 
 
 
Accumulated deficit
$
(309,287
)
 
$
2,474

 
$
(306,813
)