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Restricted Stock Awards - Additional Information (Detail) (USD $)
12 Months Ended
Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unrecognized compensation cost related to non-vested restricted stock awards $ 135,000
Restricted Stock Awards [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Weighted average period 1 year 1 month 6 days
Minimum [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting periods of restricted stock award 4 years
Maximum [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting periods of restricted stock award 5 years