LEASES - Quantitative Information of Operating Leases (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Lease, Cost [Abstract]
Operating lease cost	$ 551	$ 544	$ 1,100	$ 1,341
Variable lease cost	12	7	24	36
Operating lease expense	563	551	1,124	1,377
Short-term lease expense	421	450	855	883
Total lease expense	984	1,001	1,979	2,260
Cash paid for amounts included in the lease liability - operating cash flows from operating leases	551	544	1,099	1,353
Right of use assets obtained in exchange for operating lease liabilities	$ 0	$ 0	$ 116	$ 18,771