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CONVERTIBLE NOTES PAYABLE	3 Months Ended
CONVERTIBLE NOTES PAYABLE	Mar. 31, 2017
Debt Disclosure [Abstract]
CONVERTIBLE NOTES PAYABLE	CONVERTIBLE NOTES PAYABLE On May 29, 2014, the Company entered into a Note Purchase Agreement relating to a private placement by the Company of $46.0 million aggregate principal senior convertible notes due in 2019 (the “Notes”) which are convertible into shares of the Company’s common stock at an initial conversion price of $17.41 per share. The conversion price is subject to customary anti-dilution protection. The Notes bear interest at a rate of 4.5% per annum, payable semiannually in arrears on May 15 and November 15 of each year. The Notes mature on May 30, 2019 unless earlier converted or repurchased in accordance with the terms, and there are no contractual payments due prior to that date. At March 31, 2017 and December 31, 2016, the aggregate carrying value of the Notes was $44.6 million and $44.4 million, respectively.