STOCKHOLDERS' DEFICIT - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands					6 Months Ended
	Jun. 22, 2016	Jun. 14, 2016	Jul. 31, 2015	Mar. 09, 2015	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	May 02, 2016	Jun. 30, 2015
Class of Warrant or Right [Line Items]
Proceeds from issuance of equity and temporary equity			$ 1,100
Amount of equity able to raise								$ 200,000
Value of stock issued in secondary offering					$ 20,776	$ 83,267
Common Stock | Secondary Offering
Class of Warrant or Right [Line Items]
Share price (in dollars per share)	$ 2.00
Stock issued (in shares)	45,200,000
Value of stock issued in secondary offering	$ 83,300
Common Stock | Over-Allotment Option
Class of Warrant or Right [Line Items]
Stock issued (in shares)	5,200,000
PIPE Warrants
Class of Warrant or Right [Line Items]
Additional contribution by investors				$ 500
PIPE Warrants | Common Stock
Class of Warrant or Right [Line Items]
Common stock reserved for future issuance (in shares)					3,600,000
Class A Warrants
Class of Warrant or Right [Line Items]
Warrants issued (in shares)			31,025	1,800,000
Exercise price of warrants (in dollars per share)				$ 5.17					$ 5.17
Class B Warrants
Class of Warrant or Right [Line Items]
Warrants issued (in shares)			31,025	1,800,000
Exercise price of warrants (in dollars per share)				$ 6.45					6.45
Class A Warrants Prior to Addendum
Class of Warrant or Right [Line Items]
Exercise price of warrants (in dollars per share)				5.295
Class B Warrants Prior to Addendum
Class of Warrant or Right [Line Items]
Exercise price of warrants (in dollars per share)				$ 6.595
Series A Preferred Stock
Class of Warrant or Right [Line Items]
Shares issued (in shares)			10,822	625,000	21,645		21,645
Share price (in dollars per share)			$ 100	$ 100.00
Proceeds from issuance of equity and temporary equity				$ 62,500
Redemption price (in dollars per share)				$ 5.17
Exercise price of warrants (in dollars per share)									$ 5.17
Series A convertible preferred stock, shares authorized (in shares)				825,000	825,000		825,000
Dividend accrual rate					11.50%
Convertible preferred stock series, shares outstanding (in shares)					21,645		21,645
Convertible preferred stock series, liquidation preference					$ 2,754		$ 2,603
Series A Preferred Stock | PIPE Warrants
Class of Warrant or Right [Line Items]
Shares issued (in shares)					10,823
Series B Preferred Stock
Class of Warrant or Right [Line Items]
Shares converted (in shares)		614,177
Convertible preferred stock series, shares outstanding (in shares)					0
Series C Preferred Stock
Class of Warrant or Right [Line Items]
Shares issued (in shares)					614,177		614,177
Series A convertible preferred stock, shares authorized (in shares)					625,000		625,000
Shares issued in conversion (in shares)		614,177
Dividend rate of non-cash dividend payable					11.50%
Convertible preferred stock series, shares outstanding (in shares)					614,177		614,177
Convertible preferred stock series, liquidation preference					$ 79,858		$ 75,491