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Acquired Intangible Assets (Detail) - Annual amortization expense related to intangible assets (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]    
2015 $ 129us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths  
2016 129us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo  
2017 120us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree  
2018 119us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour  
2019 11us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive  
Thereafter 37us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive  
Total $ 545us-gaap_FiniteLivedIntangibleAssetsNet $ 410us-gaap_FiniteLivedIntangibleAssetsNet