PROPERTY AND EQUIPMENT, SCHEDULE (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Property and equipment
Less accumulated depreciation and amortization	$ (1,819)	$ (3,218)
Property and equipment, net	157	510
Computer software and hardware
Property and equipment
Gross property and equipment	241	606
Research and lab equipment
Property and equipment
Gross property and equipment	508	1,895
Leasehold improvements
Property and equipment
Gross property and equipment	431	431
Office equipment
Property and equipment
Gross property and equipment	$ 796	$ 796