INCOME TAXES - Income tax (benefit) expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal	$ (118)	$ 140
State and local	87	173
Total current tax (benefit) expense	(31)	313
Deferred:
Federal	1,567	1,902
Net deferred tax asset remeasurement		1,179
State and local	239	(410)
Total deferred taxes	1,806	2,671
Income tax expense	$ 1,775	$ 2,984
Effective income tax rate (as a percent)	21.00%	35.00%