INCOME TAXES - Income tax expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Current tax expense:
Federal	$ 1,865	$ 1,080
State	372	309
Total tax expense:	2,237	1,389
Deferred tax expense/(benefit):
Federal	120	(462)
State	92	(263)
Total deferred tax expense/(benefit):	212	(725)
Total	$ 2,449	$ 664