LEASES - Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Leases [Abstract]
Operating lease expense	$ 83	$ 385	$ 471	$ 703
Short-term lease expense	47	98	122	164
Less: Sublease income	0	(78)	0	(78)
Lease expense	$ 130	$ 405	$ 593	$ 789