LEASES - Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Total operating lease cost	$ 1,339	$ 1,803
Finance Lease cost, Amortization of ROU assets	32	0
Finance Lease cost, Interest expense	56	0
Variable lease cost	680	1,322
Total lease cost	$ 2,107	$ 3,125