Annual report pursuant to Section 13 and 15(d)

Goodwill and Intangible Assets - Additional Information (Detail)

v2.4.1.9
Goodwill and Intangible Assets - Additional Information (Detail) (USD $)
 12 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]    
Impairment of goodwill $ 0us-gaap_GoodwillImpairmentLoss $ 0us-gaap_GoodwillImpairmentLoss
Amortization of intangible assets 326,000us-gaap_AmortizationOfIntangibleAssets 320,000us-gaap_AmortizationOfIntangibleAssets
Amortization expense of finite-lived intangible assets for fiscal year 2015 320,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo  
Amortization expense of finite-lived intangible assets for fiscal year 2016 320,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree  
Amortization expense of finite-lived intangible assets for fiscal year 2017 320,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour  
Amortization expense of finite-lived intangible assets for fiscal year 2018 320,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive  
Amortization expense of finite-lived intangible assets thereafter fiscal year 2018 280,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive  
Impairment of intangible assets $ 0us-gaap_ImpairmentOfIntangibleAssetsFinitelived