INCOME TAXES - Reconciliation of income taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income tax expense computed at 21% and 35% statutory rate, respectively	$ 1,558	$ 1,753
Statutory rate change from 35% to 21%		1,179
Permanent differences	(89)	(114)
State taxes, net of federal expense	258	166
Other, net	48
Income tax expense	$ 1,775	$ 2,984