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Income Taxes - Income Taxes Computed Using Federal Income Tax Rate (Detail) - USD ($)
3 Months Ended 12 Months Ended
Sep. 30, 2015
Jun. 30, 2015
Dec. 31, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Mar. 31, 2013
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2013
Income Tax Disclosure [Abstract]                      
Amount computed using statutory rate                 $ 674,260 $ (1,798,479) $ (2,473,374)
Net change in valuation allowance for net deferred tax assets                 (1,618,671) 1,677,309 1,968,987
Other                 (151,209)    
Foreign rate differential                 970    
Non-deductible items                 181,786 411,473 548,839
State income tax                 369,844 (288,077) (43,376)
Income tax provision (benefit) $ 31,872 $ (577,789) $ 2,897 $ 95 $ 1,170 $ 961 $ 276 $ 800 $ (543,020) $ 2,226 $ 1,076