STOCKHOLDERS' EQUITY - Warrants (Details) $ in Thousands	Jun. 30, 2018 USD ($) shares
Registration statement
Warrants issued (in shares)	2,154,248
Net proceeds from issuance of warrants | $	$ 171
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%