Property and Equipment (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Components of Property and equipment
Property and Equipment, Gross	$ 429	$ 514
Accumulated depreciation and amortization	(400)	(485)
Property and equipment, net	29	29
Computer Equipment
Components of Property and equipment
Estimated Life	3 years
Property and Equipment, Gross	99	99
Lab Equipment
Components of Property and equipment
Estimated Life	5 years
Property and Equipment, Gross	142	142
Furniture and Fixtures
Components of Property and equipment
Estimated Life	5 years
Property and Equipment, Gross	89	89
Computer Software
Components of Property and equipment
Estimated Life	3 years
Property and Equipment, Gross	91	176
Leasehold Improvements
Components of Property and equipment
Estimated Life	Lesser of useful life or life of the lease
Property and Equipment, Gross	$ 8	$ 8