Other Long-Term Liabilities (Details 2) (USD $)	3 Months Ended		9 Months Ended		1 Months Ended	3 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 Development Services Agreement	Sep. 30, 2013 Development Services Agreement
Other Long-Term Liabilities
Approved project plan for the development services					$ 4,800,000
Term of the agreement					3 years
Upfront payment recognized as revenue over the term of the agreement					1,300,000
Revenue related to the Rockefeller agreement	$ 940,000	$ 79,000	$ 1,040,000	$ 228,000		$ 900,000