Commitments and Contingencies (Details) (USD $)	1 Months Ended	9 Months Ended
	May 31, 2004	Sep. 30, 2012	Dec. 31, 2011	Dec. 31, 2010
Commitments and Contingencies (Textual) [Abstract]
Payment to UABRF as upfront payment for settlement agreement			$ 8,708,000	$ 9,843,000
Percentage of payments to third-party based on royalties received from related party		20.00%
Commitments and Contingencies (Additional Textual) [Abstract]
Potential milestone payment related to a settlement agreement with a third-party	1,000,000
Percentage of payments made towards settlement agreement on net sales		0.50%
Minimum sales-based payment pursuant to settlement agreement		12,000,000
Liability recorded as a result of a settlement agreement with a third-party		0
Maturity date of settlement agreement related to intangible assets		2019-08
Third-party claim in inventorship rights		7,400,000
Novartis [Member]
Commitments and Contingencies (Textual) [Abstract]
Payment to UABRF as upfront payment for settlement agreement		11,000,000
Receivable and collaborative revenue-related party		7,400,000
UABRF [Member]
Commitments and Contingencies (Textual) [Abstract]
Payment to UABRF as upfront payment for settlement agreement		$ 4,000,000
Percentage of payments to third-party based on royalties received from related party		20.00%