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