LEASES - Lease Cost Components (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Total lease cost	$ 3,151	$ 1,309
Selling, general and administrative expenses
Lessee, Lease, Description [Line Items]
Total lease cost	1,760	718
Other (loss) gain
Lessee, Lease, Description [Line Items]
Total lease cost	1,391	591
Sublease Income	$ 2,236	$ 1,386