FAIR VALUE MEASUREMENTS - Warrants Liability (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended |
---|---|---|
Sep. 30, 2016 |
Sep. 30, 2016 |
|
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | ||
Reclassification of derivative liability to equity upon exercise of warrants | $ (14,500) | $ (14,700) |
Warrants liability | ||
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | ||
Beginning Balance | 38,810 | |
Reclassification of derivative liability to equity upon exercise of warrants | (14,699) | |
Change in estimated fair value of liability classified warrants | 4,849 | |
Ending Balance | $ 28,960 | $ 28,960 |