PROPERTY AND EQUIPMENT (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Property and equipment
Property and equipment, gross	$ 3,503	$ 3,360
Less: Accumulated depreciation	(3,181)	(3,027)
Property and equipment, net	322	333
Depreciation expenses	171	123
Computer equipment
Property and equipment
Property and equipment, gross	1,534	1,421
Office and other equipment
Property and equipment
Property and equipment, gross	122	89
Laboratory equipment
Property and equipment
Property and equipment, gross	1,794	1,794
Leasehold improvements
Property and equipment
Property and equipment, gross	$ 53	$ 56