LEASES - Lease Cost Components (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Lessee, Lease, Description [Line Items]
Total lease cost	$ 572	$ 323	$ 1,240	$ 983
Selling, general and administrative expenses
Lessee, Lease, Description [Line Items]
Operating lease cost	424	175	797	540
Other gain (loss)
Lessee, Lease, Description [Line Items]
Operating lease cost	148	148	443	443
Sublease Income	$ 347	$ 362	$ 1,040	$ 1,085