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Quarterly Results of Operations (Unaudited) - Additional Information (Detail) (USD $) | 3 Months Ended
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Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract] |
Income tax valuation allowance against certain deferred tax assets | $ 10,132,000 us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount

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- Definition Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=37586315&loc=d3e32123-109318 + Details
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