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Nature of Operations and Summary of Significant Accounting Policies - Calculation of Basic and Diluted Net Loss Per Share (Detail) (USD $)	3 Months Ended		6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Earnings Per Share Basic And Diluted [Abstract]
Net loss	$ (2,193,017)	$ (2,393,275)	$ (3,661,317)	$ (3,752,917)
Weighted-average common shares outstanding - basic	30,453,455	26,473,938	30,427,646	26,246,642
Effect of dilutive common share equivalents
Weighted-average common shares and share equivalents outstanding - diluted	30,453,455	26,473,938	30,427,646	26,246,642
Net loss per share - basic	$ (0.07)	$ (0.09)	$ (0.12)	$ (0.14)
Net loss per share - diluted	$ (0.07)	$ (0.09)	$ (0.12)	$ (0.14)

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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