PROPERTY AND EQUIPMENT - Other Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property and equipment, net	$ 305	$ 393
Other Property and Equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,259	1,233
Less accumulated depreciation and amortization	(954)	(840)
Property and equipment, net	305	393
Other Property and Equipment | Computer and communications equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	828	802
Other Property and Equipment | Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	389	389
Other Property and Equipment | Furniture and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 42	$ 42