LEASES - Quantitative Information of Operating Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Lease, Cost [Abstract]
Operating lease cost	$ 549	$ 797
Variable lease cost	12	29
Operating lease expense	561	826
Short-term lease expense	434	433
Total lease expense	995	1,259
Cash paid for amounts included in the lease liability - operating cash flows from operating leases	548	809
Right of use assets obtained in exchange for operating lease liabilities	$ 116	$ 18,350