EMPLOYEE BENEFIT PLANS - Projected Benefit Obligation and Fair Value of Plan Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Projected benefit obligation:
Balance, beginning of year	$ 388	$ 367
Service cost	56	61
Interest cost	1	1
Liability (gain) loss	(2)	(18)
Benefits paid to participants	(128)	(31)
Foreign currency	4	8
Balance, end of year	319	388
Plan assets:
Fair value, beginning of year	0	0
Company contributions	128	31
Benefits paid to participants	(128)	(31)
Fair value, end of year	$ 0	$ 0