INCOME TAXES - Reconciliation of the Income Tax Rate (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Tax Disclosure [Abstract]
Tax benefit at statutory rate	$ (6,445)	$ (3,411)
State tax expense (benefit), net of federal taxes	36	(16)
Valuation allowance changes affecting income tax provision	6,976	3,388
Non-deductible transaction costs and other	52	62
Total income tax expense	$ 619	$ 23