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Segment Information
9 Months Ended
Sep. 30, 2011
Segment Information [Abstract] 
Segment Information
 
21.   Segment Information
 
We operate as one business segment, which is the business of discovering, developing, manufacturing and marketing therapies for serious diseases with a focus on neurology, immunology and hemophilia and therefore, our chief operating decision-maker manages the operations of our Company as a single operating segment.