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Intangible Assets (Tables)
3 Months Ended
Dec. 31, 2012
Intangible Assets [Abstract]  
Intangible assets
                 
    December 31,     September 30,  
    2012     2012  

Cost

  $ 348,832     $ 358,925  

Accumulated amortization

    (200,330     (200,468
   

 

 

   

 

 

 
    $ 148,502     $ 158,457  
   

 

 

   

 

 

 
     
    December 31,     December 31,  
    2012     2011  

Amortization expense

  $ 5,800     $ 7,652  

Loss on sale or impairment of patents

    —         10,616