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Agreement with SBIO Pte Ltd (Details) (USD $)
In Millions
3 Months Ended 6 Months Ended
Mar. 31, 2011
Jun. 30, 2011
May 31, 2010
Agreement with SBIO Pte Ltd (Textuals) [Abstract]      
Additional Payment Under Licensing and Collaboration Agreement     $ 20.0
Maximum receipt of partnering revenue or future royalty revenue   20.0  
Write off in payment 12.7    
Impairment Charge 3.0    
SBIO [Member]
     
Equity investment in SBIO and Maximum Risk of Loss      
Equity Investment   $ 1.25