FAIR VALUE MEASURMENTS (Details) $ in Thousands	Jun. 30, 2019 USD ($)
Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt instruments	$ 525,760
2017 warrants	20,547
Carrying Value | First Lien Note Facility, net of unamortized discount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt instruments	207,209
Carrying Value | Second Lien Note Facility, net of unamortized discount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt instruments	120,017
Carrying Value | 2021 Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt instruments	198,534
Fair Value | Markets for Identical Item (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt instruments	0
2017 warrants	0
Fair Value | Markets for Identical Item (Level 1) | First Lien Note Facility, net of unamortized discount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt instruments	0
Fair Value | Markets for Identical Item (Level 1) | Second Lien Note Facility, net of unamortized discount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt instruments	0
Fair Value | Markets for Identical Item (Level 1) | 2021 Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt instruments	0
Fair Value | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt instruments	200,083
2017 warrants	20,547
Fair Value | Significant Other Observable Inputs (Level 2) | First Lien Note Facility, net of unamortized discount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt instruments	0
Fair Value | Significant Other Observable Inputs (Level 2) | Second Lien Note Facility, net of unamortized discount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt instruments	0
Fair Value | Significant Other Observable Inputs (Level 2) | 2021 Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt instruments	200,083
Fair Value | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt instruments	347,628
2017 warrants	0
Fair Value | Significant Unobservable Inputs (Level 3) | First Lien Note Facility, net of unamortized discount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt instruments	215,536
Fair Value | Significant Unobservable Inputs (Level 3) | Second Lien Note Facility, net of unamortized discount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt instruments	132,092
Fair Value | Significant Unobservable Inputs (Level 3) | 2021 Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt instruments	$ 0