INCOME TAXES - Components of provision for income taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Current:
Federal	$ 8	$ 54
State	32	38
Total current tax	40	92
Deferred:
Federal	4,965	(22)
State	206	(78)
Total deferred tax	5,171	(100)
Provision for income taxes	$ 5,211	$ (8)