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Intangible Assets
 6 Months Ended
Jun. 30, 2011
Intangible Assets [Abstract]  
Intangible Assets
4. Intangible Assets
Intangible assets consist of the following:
                 
    June 30,     December 31,  
    2011     2010  
    ($ in ‘000’s)  
Zevalin intangibles
  $ 41,900     $ 41,900  
Fusilev intangibles
    16,388       —  
 
           
 
    58,288       41,900  
Less: accumulated amortization
    (14,326 )     (12,295 )
 
           
 
  $ 43,962     $ 29,605  
 
           
During the three and six months ended June 30, 2011, Zevalin intangible amortization of $930,000 and $1.9 million, respectively, are included in amortization of purchased intangibles. In addition, during the three months ended June 30, 2011, $171,000 is included in cost of goods sold related to Fusilev Targent milestones.