Income Taxes (Details 1) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Deferred Tax Assets, Operating Loss Carryforwards	$ 19,853	$ 16,007
Deferred Tax Assets, Tax Credit Carryforwards, Research	2,912	2,912
Deferred Tax Assets, Deferred Rent	313	0
Deferred Tax Assets, Accrued Compensation	76	0
Deferred Tax Assets, Gross	23,154	18,919
Deferred Tax Assets, Valuation Allowance	23,137	18,858
Deferred Tax Assets, Net of Valuation Allowance	17	61
Deferred Tax Liabilities, Property, Plant and Equipment	(17)	(61)
Deferred Tax Assets, Net	$ 0	$ 0