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Components Of (Loss)Income Before Income Taxes (Detail) (USD $)
12 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2012
(Loss) income before income taxes      
Domestic $ (11,671,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic $ 23,019,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic $ 16,936,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
Foreign (6,229,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign (3,449,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign (420,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign
(Loss) income before income tax $ (17,900,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments $ 19,570,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments $ 16,516,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments