PROPERTY AND EQUIPMENT (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property and equipment
Property and equipment, gross	$ 1,256	$ 1,061
Less: Accumulated depreciation	(627)	(447)
Property and equipment, net	629	614
Depreciation expenses	180	212	$ 199
Computer equipment
Property and equipment
Property and equipment, gross	329	329
Office and other equipment
Property and equipment
Property and equipment, gross	301	256
Laboratory equipment
Property and equipment
Property and equipment, gross	563	425
Leasehold improvements
Property and equipment
Property and equipment, gross	$ 63	$ 51