INCOME TAXES - Reconciliation of income taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income tax expense computed at 21% statutory rate	$ 2,140	$ 1,558
Permanent differences	(30)	(89)
State taxes, net of federal expense	394	258
Other, net	(321)	48
Income tax expense	$ 2,183	$ 1,775
Effective income tax rate (as a percent)	21.00%	21.00%