SUBSEQUENT EVENTS - Additional Information (Details) shares in Thousands		6 Months Ended
	Aug. 14, 2020 holder shares	Jun. 30, 2020 holder shares	Jun. 30, 2019 shares
Subsequent Event [Line Items]
Number of warrants exercised		136	737
Number of Indebtedness holders | holder		3
Subsequent Event
Subsequent Event [Line Items]
Number of Indebtedness holders | holder	1
Subsequent Event | Credit Facility | Senior Loan Facility and 2023 Notes
Subsequent Event [Line Items]
Common stock shares issued	2,200
Subsequent Event | Credit Facility | Senior Loan Facility and 2023 Notes | Series C Warrants
Subsequent Event [Line Items]
Number of warrants exercised	2,400
Subsequent Event | Credit Facility | Senior Loan Facility and 2023 Notes | Series D Warrants
Subsequent Event [Line Items]
Number of warrants exercised	5,000
Subsequent Event | Credit Facility | Senior Loan Facility and 2023 Notes | Series E Warrants
Subsequent Event [Line Items]
Number of warrants exercised	29,200
Subsequent Event | Credit Facility | Senior Loan Facility and 2023 Notes | Series F Warrants
Subsequent Event [Line Items]
Number of warrants exercised	300