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Intangible Assets - Additional Information (Detail) (USD $) | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended
--- | --- | --- | --- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2013 Licensing Agreements | Sep. 30, 2013 Patents | Jun. 30, 2013 Patents | Sep. 30, 2013 Patents Minimum | Sep. 30, 2013 Patents Maximum
Expected Amortization Expense [Line Items] |  |  |  |  |  |  |  |
Amortization period of intangible assets | 12 years |  |  | 4 years |  |  | 3 years | 20 years
Amortization of license agreements in 2014 | $ 55,000 |  |  |  |  |  |  |
Amortization of license agreements in 2015 | 55,000 |  |  |  |  |  |  |
Amortization of license agreements in 2016 | 13,000 |  |  |  |  |  |  |
Amortization of license agreements, thereafter | 0 |  |  |  |  |  |  |
Net value of capitalized net book value | 123,191 | 1,667,247 | 1,731,211 |  |  | 1,300,000 |  |
Impairment charge | $ 1,308,047 |  |  |  | $ 1,300,000 |  |  |

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