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Summary of the Organization, Description of Business and Significant Accounting Policies - Schedule of Non-Vested Restricted Stock Units Compensation (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total expected compensation expense related to Restricted Stock Units $ 8 $ 52
Unrecognized compensation expense related to RSU's at September 30, 2013 500  
Restricted Stock Unit Activity [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total expected compensation expense related to Restricted Stock Units 2,667  
Compensation Expense recognized as of September 30, 2013 (2,156)  
Unrecognized compensation expense related to RSU's at September 30, 2013 $ 511