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Fair Value, Liabilities Measured on Recurring and Nonrecurring Basis (Details) (USD $)
 12 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Summary Of Significant Accounting Policies Fair Value, Liabilities Measured On Recurring And Nonrecurring Basis 1 3.13%avxl_FairValueLiabilitiesMeasuredOnRecurringAndNonrecurringBasisZeroTwoSixFourOneThreeOneTwoThreeThreewVnbWySevenmSixZm  
Summary Of Significant Accounting Policies Fair Value, Liabilities Measured On Recurring And Nonrecurring Basis 2 3.21%avxl_FairValueLiabilitiesMeasuredOnRecurringAndNonrecurringBasisZeroTwoSixFourOneThreeOneTwoThreefKcdFivednXFvZerot  
Summary Of Significant Accounting Policies Fair Value, Liabilities Measured On Recurring And Nonrecurring Basis 3 29.58avxl_FairValueLiabilitiesMeasuredOnRecurringAndNonrecurringBasisZeroTwoSixFourOneThreeOneTwoThreeTwoThreeHTwoZeroOnevvVnSC  
Summary Of Significant Accounting Policies Fair Value, Liabilities Measured On Recurring And Nonrecurring Basis 4 29.48avxl_FairValueLiabilitiesMeasuredOnRecurringAndNonrecurringBasisZeroTwoSixFourOneThreeOneTwoThreeRNbqWkOneZeroTCSEight  
Summary Of Significant Accounting Policies Fair Value, Liabilities Measured On Recurring And Nonrecurring Basis 5 100.71%avxl_FairValueLiabilitiesMeasuredOnRecurringAndNonrecurringBasisZeroTwoSixFourOneThreeOneTwoThreeTMTsJrZNineqyTwoh  
Summary Of Significant Accounting Policies Fair Value, Liabilities Measured On Recurring And Nonrecurring Basis 6 100.07%avxl_FairValueLiabilitiesMeasuredOnRecurringAndNonrecurringBasisZeroTwoSixFourOneThreeOneTwoThreekTcTwoFourPJSevenDZvr  
Summary Of Significant Accounting Policies Fair Value, Liabilities Measured On Recurring And Nonrecurring Basis 7 $ 0.26avxl_FairValueLiabilitiesMeasuredOnRecurringAndNonrecurringBasisZeroTwoSixFourOneThreeOneTwoThreeqDVNineSixQZZEighthtc  
Summary Of Significant Accounting Policies Fair Value, Liabilities Measured On Recurring And Nonrecurring Basis 8 0.18avxl_FairValueLiabilitiesMeasuredOnRecurringAndNonrecurringBasisZeroTwoSixFourOneThreeOneTwoThreepFiveprTckyFourbbf  
Summary Of Significant Accounting Policies Fair Value, Liabilities Measured On Recurring And Nonrecurring Basis 9 0.00%avxl_FairValueLiabilitiesMeasuredOnRecurringAndNonrecurringBasisZeroTwoSixFourOneThreeOneTwoThreeNSixPQkFHwkTsm  
Summary Of Significant Accounting Policies Fair Value, Liabilities Measured On Recurring And Nonrecurring Basis 10 0.00%avxl_FairValueLiabilitiesMeasuredOnRecurringAndNonrecurringBasisZeroTwoSixFourOneThreeOneTwoThreezClOneMTwoXLfqLZero  
Summary Of Significant Accounting Policies Fair Value, Liabilities Measured On Recurring And Nonrecurring Basis 1   0.28%avxl_FairValueLiabilitiesMeasuredOnRecurringAndNonrecurringBasisZeroTwoSixFourOneThreeOneTwoThreeBXShXsSixrNineWnc
Summary Of Significant Accounting Policies Fair Value, Liabilities Measured On Recurring And Nonrecurring Basis 2   0.10%avxl_FairValueLiabilitiesMeasuredOnRecurringAndNonrecurringBasisZeroTwoSixFourOneThreeOneTwoThreezTXThreegPSevenptZeroPm
Summary Of Significant Accounting Policies Fair Value, Liabilities Measured On Recurring And Nonrecurring Basis 3   0.13%avxl_FairValueLiabilitiesMeasuredOnRecurringAndNonrecurringBasisZeroTwoSixFourOneThreeOneTwoThreeLKOnehZerozdTFZNZ
Summary Of Significant Accounting Policies Fair Value, Liabilities Measured On Recurring And Nonrecurring Basis 4   1.49avxl_FairValueLiabilitiesMeasuredOnRecurringAndNonrecurringBasisZeroTwoSixFourOneThreeOneTwoThreeSixHVThreeQhhwNSyp
Summary Of Significant Accounting Policies Fair Value, Liabilities Measured On Recurring And Nonrecurring Basis 5   1.25avxl_FairValueLiabilitiesMeasuredOnRecurringAndNonrecurringBasisZeroTwoSixFourOneThreeOneTwoThreebWTJOneFOnefXTdOne
Summary Of Significant Accounting Policies Fair Value, Liabilities Measured On Recurring And Nonrecurring Basis 6   1.03avxl_FairValueLiabilitiesMeasuredOnRecurringAndNonrecurringBasisZeroTwoSixFourOneThreeOneTwoThreeSevenNMJThreefbXVzws
Summary Of Significant Accounting Policies Fair Value, Liabilities Measured On Recurring And Nonrecurring Basis 7   81.57%avxl_FairValueLiabilitiesMeasuredOnRecurringAndNonrecurringBasisZeroTwoSixFourOneThreeOneTwoThreeKSixSixCVTWSKQWT
Summary Of Significant Accounting Policies Fair Value, Liabilities Measured On Recurring And Nonrecurring Basis 8   77.51%avxl_FairValueLiabilitiesMeasuredOnRecurringAndNonrecurringBasisZeroTwoSixFourOneThreeOneTwoThreedMSMKwWXEightTLC
Summary Of Significant Accounting Policies Fair Value, Liabilities Measured On Recurring And Nonrecurring Basis 9   107.62%avxl_FairValueLiabilitiesMeasuredOnRecurringAndNonrecurringBasisZeroTwoSixFourOneThreeOneTwoThreefghMzCLTwonNinelS
Summary Of Significant Accounting Policies Fair Value, Liabilities Measured On Recurring And Nonrecurring Basis 10   0.61avxl_FairValueLiabilitiesMeasuredOnRecurringAndNonrecurringBasisZeroTwoSixFourOneThreeOneTwoThreekkNinesWXscfcwEight
Summary Of Significant Accounting Policies Fair Value, Liabilities Measured On Recurring And Nonrecurring Basis 11   0.65avxl_FairValueLiabilitiesMeasuredOnRecurringAndNonrecurringBasisZeroTwoSixFourOneThreeOneTwoThreebTWflMThreeBmnDB
Summary Of Significant Accounting Policies Fair Value, Liabilities Measured On Recurring And Nonrecurring Basis 12   $ 0.25avxl_FairValueLiabilitiesMeasuredOnRecurringAndNonrecurringBasisZeroTwoSixFourOneThreeOneTwoThreeSevenzpLhcLDThreectZero
Summary Of Significant Accounting Policies Fair Value, Liabilities Measured On Recurring And Nonrecurring Basis 13   0.00%avxl_FairValueLiabilitiesMeasuredOnRecurringAndNonrecurringBasisZeroTwoSixFourOneThreeOneTwoThreeJGQpVTTThreeJTXl
Summary Of Significant Accounting Policies Fair Value, Liabilities Measured On Recurring And Nonrecurring Basis 14   0.00%avxl_FairValueLiabilitiesMeasuredOnRecurringAndNonrecurringBasisZeroTwoSixFourOneThreeOneTwoThreeQRZtQLdFivePbJc
Summary Of Significant Accounting Policies Fair Value, Liabilities Measured On Recurring And Nonrecurring Basis 15   0.00%avxl_FairValueLiabilitiesMeasuredOnRecurringAndNonrecurringBasisZeroTwoSixFourOneThreeOneTwoThreeZeroZeronylKyXKTwolq