Property and Equipment (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Components of Property and equipment
Property and Equipment, Gross	$ 514	$ 533
Less accumulated depreciation and amortization	(485)	(510)
Property and equipment, net	29	23
Computer Equipment
Components of Property and equipment
Estimated Life	3 years
Property and Equipment, Gross	99	104
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	93
Computer Software
Components of Property and equipment
Estimated Life	3 years
Property and Equipment, Gross	176	176
Leasehold Improvements
Components of Property and equipment
Estimated Life	Lesser of useful life or life of the lease
Property and Equipment, Gross	$ 8	$ 18