INCOME TAXES - Income tax (benefit) expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Current:
Federal	$ 3,076	$ (118)
State and local	323	87
Total current tax expense (benefit)	3,399	(31)
Deferred:
Federal	(1,338)	1,567
State and local	122	239
Total deferred taxes	(1,216)	1,806
Income tax expense	$ 2,183	$ 1,775
Effective income tax rate (as a percent)	21.00%	21.00%