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Intangible Assets (Details) (USD $)
3 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Sep. 30, 2012
Intangible Assets      
Cost $ 348,832   $ 358,925
Accumulated amortization (200,330)   (200,468)
Total 148,502   158,457
Amortization expense 5,800 7,652  
Loss on sale or impairment of patents   $ 10,616