EQUITY - Equity and Warrants (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended
	Nov. 06, 2017	Jul. 25, 2017	Dec. 31, 2017	Sep. 30, 2017	Mar. 31, 2019	Mar. 31, 2018
Class of Warrant or Right [Line Items]
Issuance of common stock (in shares)	3,423,367
Issuance of common stock	$ 23,300		$ 23,279	$ 39,888
Warrants outstanding (in shares)					23,978	23,978
Warrants exercisable price (in dollars per share)					$ 5.00	$ 5.00
Public Stock Offering
Class of Warrant or Right [Line Items]
Issuance of common stock (in shares)		9,583,332
Public offering price (in dollars per share)		$ 4.50
Offering proceeds, gross		$ 43,100
Underwriting
Class of Warrant or Right [Line Items]
Option to purchase additional shares (in shares)		1,249,999