EMPLOYEE BENEFIT PLANS - Components of Net Period Benefit Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Retirement Benefits [Abstract]
Service cost	$ 61	$ 76
Interest cost	1	2
Amortization of transition obligation	4	4
Defined Benefit Plan, Amortization of Gain (Loss)	(3)	0
Prior service cost	(42)	(42)
Total pension expense	$ 21	$ 40