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Schedule of Effective Income Tax Rate Reconciliation (Details) (USD $) | 12 Months Ended
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Sep. 30, 2014
Income Taxes Schedule Of Effective Income Tax Rate Reconciliation 1 | 34.00%avxl_ScheduleOfEffectiveIncomeTaxRateReconciliationZeroTwoSixFourOneThreeOneTwoThreeZeroXTQbSixmzRxVX
Income Taxes Schedule Of Effective Income Tax Rate Reconciliation 2 | $ (3,865,000)avxl_ScheduleOfEffectiveIncomeTaxRateReconciliationZeroTwoSixFourOneThreeOneTwoThreeCltNineCMQMrvTZero
Income Taxes Schedule Of Effective Income Tax Rate Reconciliation 3 | (1,258,000)avxl_ScheduleOfEffectiveIncomeTaxRateReconciliationZeroTwoSixFourOneThreeOneTwoThreeHxbzNhSThreeZerolHC
Income Taxes Schedule Of Effective Income Tax Rate Reconciliation 4 | 13,000 avxl_ScheduleOfEffectiveIncomeTaxRateReconciliationZeroTwoSixFourOneThreeOneTwoThreeXDXSevenmMFiveOneQkNineN
Income Taxes Schedule Of Effective Income Tax Rate Reconciliation 5 | 0 avxl_ScheduleOfEffectiveIncomeTaxRateReconciliationZeroTwoSixFourOneThreeOneTwoThreetCSevenSThreeFivepTwoFiveySN
Income Taxes Schedule Of Effective Income Tax Rate Reconciliation 6 | 202,000 avxl_ScheduleOfEffectiveIncomeTaxRateReconciliationZeroTwoSixFourOneThreeOneTwoThreeKxMldkzWmEightGq
Income Taxes Schedule Of Effective Income Tax Rate Reconciliation 7 | 0 avxl_ScheduleOfEffectiveIncomeTaxRateReconciliationZeroTwoSixFourOneThreeOneTwoThreeSevensnEightFourWVnWBfy
Income Taxes Schedule Of Effective Income Tax Rate Reconciliation 8 | 2,736,000 avxl_ScheduleOfEffectiveIncomeTaxRateReconciliationZeroTwoSixFourOneThreeOneTwoThreeGTwoHNineZeroCWtZerovLC
Income Taxes Schedule Of Effective Income Tax Rate Reconciliation 9 | 501,000 avxl_ScheduleOfEffectiveIncomeTaxRateReconciliationZeroTwoSixFourOneThreeOneTwoThreeVsEightNSevenPbNineJQQSix
Income Taxes Schedule Of Effective Income Tax Rate Reconciliation 10 | (994,000)avxl_ScheduleOfEffectiveIncomeTaxRateReconciliationZeroTwoSixFourOneThreeOneTwoThreeOnezyHhZerobZerogVTk
Income Taxes Schedule Of Effective Income Tax Rate Reconciliation 11 | 7,000 avxl_ScheduleOfEffectiveIncomeTaxRateReconciliationZeroTwoSixFourOneThreeOneTwoThreepLFiveNineFourSevenThreegFiveJThreeV
Income Taxes Schedule Of Effective Income Tax Rate Reconciliation 12 | 808,000 avxl_ScheduleOfEffectiveIncomeTaxRateReconciliationZeroTwoSixFourOneThreeOneTwoThreeEighthQsCFivehNDGEightz
Income Taxes Schedule Of Effective Income Tax Rate Reconciliation 13 | 0 avxl_ScheduleOfEffectiveIncomeTaxRateReconciliationZeroTwoSixFourOneThreeOneTwoThreeZerogTwoOneOneHvkfmdb
Income Taxes Schedule Of Effective Income Tax Rate Reconciliation 14 | (16,000)avxl_ScheduleOfEffectiveIncomeTaxRateReconciliationZeroTwoSixFourOneThreeOneTwoThreeBcThreeVFivedSFourdHdSix
Income Taxes Schedule Of Effective Income Tax Rate Reconciliation 15 | (5,000)avxl_ScheduleOfEffectiveIncomeTaxRateReconciliationZeroTwoSixFourOneThreeOneTwoThreeHxwFivePhSixlHCfg
Income Taxes Schedule Of Effective Income Tax Rate Reconciliation 16 | (26,000)avxl_ScheduleOfEffectiveIncomeTaxRateReconciliationZeroTwoSixFourOneThreeOneTwoThreeEightgSevenSevenQpqgfntThree
Income Taxes Schedule Of Effective Income Tax Rate Reconciliation 17 | (17,000)avxl_ScheduleOfEffectiveIncomeTaxRateReconciliationZeroTwoSixFourOneThreeOneTwoThreepQkgfPMZerozLEightT
Income Taxes Schedule Of Effective Income Tax Rate Reconciliation 18 | 14,000 avxl_ScheduleOfEffectiveIncomeTaxRateReconciliationZeroTwoSixFourOneThreeOneTwoThreeFivenTFourPGsvQZeroFourC
Income Taxes Schedule Of Effective Income Tax Rate Reconciliation 19 | (161,000)avxl_ScheduleOfEffectiveIncomeTaxRateReconciliationZeroTwoSixFourOneThreeOneTwoThreeHFourldnXMRmFSixd
Income Taxes Schedule Of Effective Income Tax Rate Reconciliation 20 | 1,128,000 avxl_ScheduleOfEffectiveIncomeTaxRateReconciliationZeroTwoSixFourOneThreeOneTwoThreepyEightsPcdntXtSeven
Income Taxes Schedule Of Effective Income Tax Rate Reconciliation 21 | 933,000 avxl_ScheduleOfEffectiveIncomeTaxRateReconciliationZeroTwoSixFourOneThreeOneTwoThreerPNineBqTQSevenbEightSR
Income Taxes Schedule Of Effective Income Tax Rate Reconciliation 22 | 0 avxl_ScheduleOfEffectiveIncomeTaxRateReconciliationZeroTwoSixFourOneThreeOneTwoThreeSevenySevenzfxPNcdkEight
Income Taxes Schedule Of Effective Income Tax Rate Reconciliation 23 | $ 0 avxl_ScheduleOfEffectiveIncomeTaxRateReconciliationZeroTwoSixFourOneThreeOneTwoThreeRcRDZeroSevenfFivesKThreeL

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