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Acquisition-Related Contingent Consideration (Tables)
 6 Months Ended
Jun. 30, 2012
Acquisition-Related Contingent Consideration [Abstract]  
Company's acquisition-related contingent consideration
The following table presents changes to the Company's acquisition-related contingent consideration for the period ending June 30, 2012:
 
Fair Value Measurements Using Significant
Unobservable Inputs(Level 3)
Acquisition-related Contingent Consideration
As recorded on
Measurement Adjustment
As adjusted
December 31, 2011
on June 30, 2012
 
 
Royalties for RSV
E
 3,216
E
 349
E
 3,565
Royalties for HSV
E
 2,537
E
 189
E
 2,726
Royalties for Influenza Vaccines
E
 --
E
 --
E
 --
Total Contingent Consideration
E
 5,753
E
538
E
 6,291