LEASES - Lease Costs & Additional Lease Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Leases [Abstract]
Operating lease cost	$ 3,334
Variable lease cost	0
Sublease income	(3,098)
Lease cost	$ 236
Weighted-average remaining lease term - operating leases (in years)	1 year 8 months 12 days
Weighted-average discount rate - operating leases (as a percent)	4.13%