INCOME TAXES - Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current:
Federal	$ 1,126	$ 5,099	$ 6,422
State	343	96	53
Foreign	3,016	2,344	3,083
Current income tax expense	4,485	7,539	9,558
Deferred:
Federal	981	734	1,599
State	13	9	17
Foreign	32	(15)	100
Deferred income tax expense	1,026	728	1,716
Income tax expense	$ 5,511	$ 8,267	$ 11,274