FAIR VALUE MEASUREMENTS - Financial Instrument that were not Measured at Fair Value (Details) - Fair Value, Inputs, Level 2 [Member] - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Term Loan, Net [Member] | Reported Value Measurement [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Financial Liabilities, Carrying Amount	$ 99,077	$ 39,137
Term Loan, Net [Member] | Estimate of Fair Value Measurement [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Financial Liabilities, Fair Value	101,000	41,500
Convertible Notes, Net [Member] | Reported Value Measurement [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Financial Liabilities, Carrying Amount	0	20,331
Convertible Notes, Net [Member] | Estimate of Fair Value Measurement [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Financial Liabilities, Fair Value	$ 0	$ 27,250