Commitments and Contingencies (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Disclosure Commitments And Contingencies Additional Information [Abstract]
Operating lease expense	$ 74,000	$ 15,000	$ 18,000
Commitments under operating lease agreements in 2013	253,000
Commitments under operating lease agreements in 2014	250,000
Operating leases, future minimum payments, due thereafter	667,000
Commitments under development contract agreements in 2013	$ 2,100,000