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Intangible Assets
 9 Months Ended
Jun. 30, 2011
Intangible Assets [Abstract]  
Intangible Assets
6. Intangible Assets
A summary of our acquired intangible assets subject to amortization, as of June 30, 2011 and September 30, 2010 is as follows:
                                 
    June 30, 2011     September 30, 2010  
    Gross             Gross        
    Carrying     Accumulated     Carrying     Accumulated  
    Value     Amortization     Value     Amortization  
 
                               
Manufacturing technologies, core products and cell lines
  $ 11,664     $ 8,360     $ 11,644     $ 7,693  
Trademarks, licenses and patents
    3,654       1,329       3,547       997  
Customer lists and supply agreements
    12,322       6,330       12,537       5,816  
Non-compete agreements
    128       117       126       21  
 
                       
 
  $ 27,768     $ 16,136     $ 27,854     $ 14,527  
 
                       
The actual aggregate amortization expense for these intangible assets was $570 and $345 for the three months ended June 30, 2011 and 2010, respectively, and $1,796 and $1,079 for the nine months ended June 30, 2011 and 2010, respectively. The estimated aggregate amortization expense for these intangible assets for each of the fiscal years through fiscal 2015 is as follows: fiscal 2011 — $2,336, fiscal 2012 — $2,079, fiscal 2013 — $2,078, fiscal 2014 — $1,641 and fiscal 2015 — $1,392.