Leases (Details) (USD $)	12 Months Ended			163 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012
Capital Leases, Future Minimum Payments, Net Minimum Payments, Rolling Maturity [Abstract]
Capital Leases, Due in 2013	$ 60,000			$ 60,000
Capital Leases, Due in 2014	19,000			19,000
Capital Leases, Due in 2015	18,000			18,000
Capital Leases, Due in 2016	4,000			4,000
Capital Leases, Minimum Payments Due	101,000			101,000
Capital Leases, Interest Included in Payments	8,000			8,000
Capital Leases, Minimum Payments, Present Value	93,000			93,000
Operating Leases, Rent Expense, Net	707,000	601,000	601,000	3,700,000
Capital Leases, Lessee Balance Sheet [Abstract]
Lab equipment	489,000	489,000		489,000
Leasehold improvements	27,000	27,000		27,000
Total property under capital leases	516,000	516,000		516,000
Less accumulated depreciation and amortization	211,000	137,000		211,000
Capital leased assets, net	305,000	379,000		305,000
Operating Leases, Future Minimum Payments Receivable [Abstract]
Operating Leases, Due in 2013	484,000			484,000
Operating Leases, Due in 2014	441,000			441,000
Operating Leases, Due in 2015	193,000			193,000
Operating Leases, Due in 2016	170,000			170,000
Operating Leases, Due in 2017	29,000			29,000
Operating Leases, Future Minimum Payments Due	$ 1,317,000			$ 1,317,000