INCOME TAXES - Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Unrecognized Tax Benefits [Roll Forward]
Beginning of year balance	$ 112	$ 255	$ 193
Additions based on prior year tax positions	0	2	3
Additions based on current year tax positions	31	20	78
Reduction for prior year tax positions	(30)	0	(19)
Reductions for settlements	0	(165)	0
End of year balance	$ 113	$ 112	$ 255