INCOME TAXES - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Federal statutory tax rate	21.00%	35.00%
Income taxes paid	$ 0	$ 0	$ 0
Net capital loss carryforwards subject to expiration amount	$ 17,500
Capital loss carryforwards, expiration date	Dec. 31, 2019