INCOME TAXES - Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current:
Federal	$ 4	$ 124	$ (180)
State	85	93	108
Foreign	2,469	2,103	1,525
Deferred:
Foreign	(6,941)	734	(2,125)
Total provision for (benefit from) income taxes	$ (4,383)	$ 3,054	$ (672)