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Nature of Operations and Summary of Significant Accounting Policies - Components of Comprehensive Loss (Detail) (USD $)
3 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Comprehensive Income Net Of Tax [Abstract]    
Net loss $ (1,468,300) $ (1,359,642)
Other comprehensive loss:    
Change in unrealized (loss) gain on investments (841) 4,378
Total comprehensive loss $ (1,469,141) $ (1,355,264)