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Summary of the Organization, Description of Business and Significant Accounting Policies - Schedule of Non-Vested Restricted Stock Units Activity (Detail) (Restricted Stock Unit Activity [Member], USD $)
12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Restricted Stock Unit Activity [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Non-vested Beginning Balance, Number of Restricted Share Units 1,062 15,949
Granted, Number of Restricted Share Units 60,000  
Vested, Number of Restricted Share Units (1,687) (14,512)
Forfeited, Number of Restricted Share Units   (375)
Non-vested Ending Balance, Number of Restricted Share Units 59,375 1,062
Non-vested Beginning Balance, Weighted Avg. Fair Value Per Share at Each Date $ 2.59 $ 5.28
Granted, Weighted Avg. Fair Value Per Share at Each Date $ 8.61   
Vested, Weighted Avg. Fair Value Per Share at Each Date $ 4.90 $ 3.52
Forfeited, Weighted Avg. Fair Value Per Share at Each Date    $ 2.66
Non-vested Ending Balance, Weighted Avg. Fair Value Per Share at Each Date $ 8.61 $ 2.59