EMPLOYEE BENEFIT PLANS - Projected Benefit Obligation and Fair Value of Plan Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Projected benefit obligation:
Balance, beginning of year	$ 319	$ 388
Service cost	47	56
Interest cost	1	1
Liability (gain) loss	6	(2)
Benefits paid to participants	(30)	(128)
Foreign currency	19	4
Balance, end of year	370	319
Plan assets:
Fair value, beginning of year	0	0
Company contributions	30	128
Benefits paid to participants	(30)	(128)
Fair value, end of year	$ 0	$ 0