Summary of Significant Accounting Policies (Details 3) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenue Recognition on Product Sales
Revenue from royalty agreement	$ 30,000,000		$ 30,000,000
Milestone revenues recorded	0	0	2,000,000	0
Income Taxes
Net income (loss)	$ 27,858,000	$ (24,096,000)	$ 15,516,000	$ (69,867,000)