FAIR VALUE OF FINANCIAL INSTRUMENTS - Schedule of Financial Instruments Measured at Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Lease Guarantees	$ (612)	$ (734)
Fair Value Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Lease Guarantees	0	0
Derivative liabilities	0	0
Fair Value Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Lease Guarantees	0	0
Derivative liabilities	(348)	0
Fair Value Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Lease Guarantees	(612)	(734)
Derivative liabilities	$ 0	$ 0