LEASES - Lease Cost Components (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Lessee, Lease, Description [Line Items]
Total lease cost	$ 325	$ 660
Selling, general and administrative expenses
Lessee, Lease, Description [Line Items]
Operating lease cost	178	365
Other (expense) income, net
Lessee, Lease, Description [Line Items]
Operating lease cost	147	295
Sublease Income	$ 361	$ 723