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Lincoln Park Purchase Agreement (Narrative) (Details) (USD $)
 6 Months Ended 12 Months Ended
Mar. 31, 2015
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Sep. 30, 2014
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Lincoln Park Purchase Agreement 1   $ 10,000,000avxl_LincolnParkPurchaseAgreementZeroTwoSixFourOneThreeOneTwoThreeGLRgkvEightCvZerogH
Lincoln Park Purchase Agreement 2   10,000,000avxl_LincolnParkPurchaseAgreementZeroTwoSixFourOneThreeOneTwoThreeMTlwFiveTqbwTdt
Lincoln Park Purchase Agreement 3   25avxl_LincolnParkPurchaseAgreementZeroTwoSixFourOneThreeOneTwoThreeMDsNZeroTwowTfnty
Lincoln Park Purchase Agreement 4   $ 0.50avxl_LincolnParkPurchaseAgreementZeroTwoSixFourOneThreeOneTwoThreeCxSixLzBwTSixPFiveFive
Lincoln Park Purchase Agreement 5   250,000avxl_LincolnParkPurchaseAgreementZeroTwoSixFourOneThreeOneTwoThreeGZeroJcTwofGMDwNineq
Lincoln Park Purchase Agreement 6   100,000avxl_LincolnParkPurchaseAgreementZeroTwoSixFourOneThreeOneTwoThreeBBHwTwoJPQRXTC
Lincoln Park Purchase Agreement 7   341,858avxl_LincolnParkPurchaseAgreementZeroTwoSixFourOneThreeOneTwoThreeSzvKSevenSixQQvnXK
Lincoln Park Purchase Agreement 8   133,409avxl_LincolnParkPurchaseAgreementZeroTwoSixFourOneThreeOneTwoThreeXsNLhLsSevenxyhT
Lincoln Park Purchase Agreement 9   10,000,000avxl_LincolnParkPurchaseAgreementZeroTwoSixFourOneThreeOneTwoThreeWdFiveEightTnSixFourKJmg
Lincoln Park Purchase Agreement 10   73,787avxl_LincolnParkPurchaseAgreementZeroTwoSixFourOneThreeOneTwoThreeTwoEightyFourCwsZerovfSixq
Lincoln Park Purchase Agreement 11   71,335avxl_LincolnParkPurchaseAgreementZeroTwoSixFourOneThreeOneTwoThreeFourtPRRvxFWslS
Lincoln Park Purchase Agreement 12   402,510avxl_LincolnParkPurchaseAgreementZeroTwoSixFourOneThreeOneTwoThreeqqKmvbqGSixhEightEight
Lincoln Park Purchase Agreement 13   400,000avxl_LincolnParkPurchaseAgreementZeroTwoSixFourOneThreeOneTwoThreeNSZRvNFbZTwoOneTwo
Lincoln Park Purchase Agreement 14   188,170avxl_LincolnParkPurchaseAgreementZeroTwoSixFourOneThreeOneTwoThreeSevencnthTwobrbBfs
Lincoln Park Purchase Agreement 15   2,510avxl_LincolnParkPurchaseAgreementZeroTwoSixFourOneThreeOneTwoThreefXqlSevenkVxSChT
Lincoln Park Purchase Agreement 1 10,000,000avxl_LincolnParkPurchaseAgreementZeroTwoEightOneOneZeroHddShCtOnelRPB  
Lincoln Park Purchase Agreement 2 10,000,000avxl_LincolnParkPurchaseAgreementZeroTwoEightOneOneZeroJGrMMFFiveGWbBT  
Lincoln Park Purchase Agreement 3 25avxl_LincolnParkPurchaseAgreementZeroTwoEightOneOneZeroBdHdfcKlJZSevend  
Lincoln Park Purchase Agreement 4 $ 0.50avxl_LincolnParkPurchaseAgreementZeroTwoEightOneOneZeroJMpEightBnThreeThreeFourxLv  
Lincoln Park Purchase Agreement 5 250,000avxl_LincolnParkPurchaseAgreementZeroTwoEightOneOneZeroSixfcdThreeRTEightTTTwoSeven  
Lincoln Park Purchase Agreement 6 100,000avxl_LincolnParkPurchaseAgreementZeroTwoEightOneOneZeroXHJtGrhZeroFourOneqb  
Lincoln Park Purchase Agreement 7 341,858avxl_LincolnParkPurchaseAgreementZeroTwoEightOneOneZerocdhTRxCFNineCFourSix  
Lincoln Park Purchase Agreement 8 133,409avxl_LincolnParkPurchaseAgreementZeroTwoEightOneOneZerolSwcEightSixXNineLmsFive  
Lincoln Park Purchase Agreement 9 10,000,000avxl_LincolnParkPurchaseAgreementZeroTwoEightOneOneZeroDThreevOneKOnelmEightfzW  
Lincoln Park Purchase Agreement 10 $ 73,787avxl_LincolnParkPurchaseAgreementZeroTwoEightOneOneZerokmskqSixNZphsg