INCOME TAXES - Components of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current:
Federal	$ (904)	$ 869	$ (67)
State and local	224	643	(425)
Deferred:
Federal	1,548	(32)	(279)
State and local	508	20	(151)
Income tax expense (benefit)	$ 1,376	$ 1,500	$ (922)