Quarterly report pursuant to Section 13 or 15(d)

Collaboration Arrangements (Details)

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Collaboration Arrangements (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2012
Mar. 31, 2012
Jun. 30, 2012
Collaboration Arrangements (Textual) [Abstract]      
Company received an upfront payment   $ 25  
Payment based on positive results     20
Payment based on positive results   32.5  
Expected payment by the end of 2012     12.5
Amount from regulatory and development milestones     22.5
Collaboration Arrangements (Additional Textual) [Abstract]      
Company recognized of revenue 1.8   2.0
Company earned a reimbursement for eligible worldwide development expenses 3.9   5.0
Percentage of payment to be made for worldwide development expenses     70.00%
Milestone payments earned   32.5  
Portion of profits that Company is eligible to participate in United States, depending upon total sales     50.00%
Regulatory and Development Milestone [Member]
      
Collaboration Arrangements (Textual) [Abstract]      
Potential future milestones, related to development and regulatory     152.5
Amount from regulatory and development milestones     22.5
Commercialization milestones [Member]
      
Collaboration Arrangements (Textual) [Abstract]      
Potential future milestones, related to development and regulatory     340.0
Development and regulatory [Member]
      
Collaboration Arrangements (Textual) [Abstract]      
Potential future milestones, related to development and regulatory     152.5
Commercialization [Member]
      
Collaboration Arrangements (Textual) [Abstract]      
Payment based on positive results     20
Collaborative Arrangements, Co-promotion Agreement, Aggregated Disclosure [Member]
      
Collaboration Arrangements (Textual) [Abstract]      
Company received an upfront payment     $ 25