License And Collaboration Agreements (Products In Development) (Narrative 2) (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended			3 Months Ended	1 Months Ended
	Oct. 31, 2006 BayerSchering agreement [Member]	Jul. 31, 2005 BayerSchering agreement [Member]	Jan. 31, 2012 BioDelivery [Member]	Mar. 31, 2012 BioDelivery [Member]	Oct. 31, 2006 AveedTM [Member] BayerSchering agreement [Member]	Jul. 31, 2005 AveedTM [Member] BayerSchering agreement [Member]	Jan. 31, 2012 Buprenorphine and commercial and regulatory milestone [Member] BioDelivery [Member]
License And Collaboration Agreements [Line Items]
Up-front cash payment		$ 30.0		$ 30.0
Milestone Payment Due Upon Approval By FDA						5.0
Additional milestone payment				$ 15.0			$ 135.0
Expiration of agreement, time period	10 years		10 years
Percentage of net sales applied for supply price					25.00%	25.00%
Agreement termination, written notice, months			6 months