NOTES PAYABLE	6 Months Ended
Jun. 30, 2016
Debt Disclosure [Abstract]
NOTES PAYABLE	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 June 30, 2016 and December 31, 2015, the aggregate carrying value of the Notes was $44.1 million and $43.8 million, respectively. As of March 31, 2016, the Company retrospectively adopted FASB ASU No. 2015-03, "Simplifying the Presentation of Debt Issuance Costs." This ASU amends existing guidance to require the presentation of debt issuance costs in the balance sheet as a direct deduction from the carrying amount of the related debt liability instead of as a deferred charge. At June 30, 2016 and December 31, 2015 the debt issuance costs related to the Notes was $0.1 million.

NOTES PAYABLE

6 Months Ended

Jun. 30, 2016

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 June 30, 2016 and December 31, 2015, the aggregate carrying value of the Notes was $44.1 million and $43.8 million, respectively.

As of March 31, 2016, the Company retrospectively adopted FASB ASU No. 2015-03, "Simplifying the Presentation of Debt Issuance Costs." This ASU amends existing guidance to require the presentation of debt issuance costs in the balance sheet as a direct deduction from the carrying amount of the related debt liability instead of as a deferred charge. At June 30, 2016 and December 31, 2015 the debt issuance costs related to the Notes was $0.1 million.