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Nature of Operations and Summary of Significant Accounting Policies - Computation of Basic and Diluted Loss Per Share (Detail) (USD $)
3 Months Ended 9 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Earnings Per Share Basic And Diluted [Abstract]        
Net loss $ (2,052,059) $ (2,008,887) $ (5,804,976) $ (4,829,969)
Weighted average common shares outstanding - basic 27,109,787 25,613,698 26,534,357 24,980,253
Effect of dilutive common share equivalents            
Weighted average common shares and share equivalents outstanding - diluted 27,109,787 25,613,698 26,534,357 24,980,253
Net loss per share - basic $ (0.08) $ (0.08) $ (0.22) $ (0.19)
Net loss per share - diluted $ (0.08) $ (0.08) $ (0.22) $ (0.19)