INCOME TAX - Loss Before Income Tax Attributable to Domestic and Foreign Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Domestic	$ (14,266)	$ (6,945)
Foreign	(8,738)	(11,760)
Loss from continuing operations before income tax	$ (23,004)	$ (18,705)