INCOME TAXES - Components of Income Tax Expense (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current:
Federal		$ (67)	$ 10	$ 37
State and local		(425)	777	904
Deferred:
Federal		(279)	232	(1,918)
State and local		(151)	49	(473)
Effect of federal tax law change	$ 600	0	606	0
Income tax (benefit) expense		$ (922)	$ 1,674	$ (1,450)