STOCKHOLDERS' EQUITY - Warrants (Details) - USD ($) $ in Thousands	3 Months Ended		21 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Jul. 01, 2016
Registration statement
Warrants issued (in shares)	1,677,786		1,677,786
Net proceeds from issuance of warrants	$ 17	$ 4	$ 148
Registration Statement
Registration statement
Warrant right to purchase a share of Common Stock (in shares)				0.25
Premium of the exercise price of the warrant as a percent to net asset value of common stock				15.00%