Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets and Goodwill - Additional Information (Detail)

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Intangible Assets and Goodwill - Additional Information (Detail) (USD $)
3 Months Ended 6 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Jun. 30, 2014
Goodwill And Intangible Assets Disclosure [Abstract]      
Intangible assets and goodwill impairment     $ 0us-gaap_GoodwillAndIntangibleAssetImpairment
Amortization expense $ 18,000us-gaap_AmortizationOfIntangibleAssets $ 18,000us-gaap_AmortizationOfIntangibleAssets