INDEBTEDNESS - Facility components (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current debt, net of deferred financing costs	$ 12,785	$ 9,941
Non-current debt, net of deferred financing costs and current component	175,161	175,808
Term Loan and DDTL [Member]
Current borrowing on debt	13,240	10,412
Deferred financing costs	(455)	(471)
Current debt, net of deferred financing costs	12,785	9,941
Non-current borrowing on debt	168,583	177,069
Deferred financing costs	(922)	(1,261)
Non-current debt, net of deferred financing costs and current component	$ 167,661	$ 175,808