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Non-interest bearing liabilities (Details) (USD $) | 6 Months Ended
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Mar. 31, 2015
Non-interest Bearing Liabilities Non-interest Bearing Liabilities 1 | $ 133,727 avxl_NoninterestBearingLiabilitiesZeroTwoEightOneOneZeromGnCNwQSEightxlThree
Non-interest Bearing Liabilities Non-interest Bearing Liabilities 2 | 263,727 avxl_NoninterestBearingLiabilitiesZeroTwoEightOneOneZeroGRqTgTwoSevenqGOnewv
Non-interest Bearing Liabilities Non-interest Bearing Liabilities 3 | 0 avxl_NoninterestBearingLiabilitiesZeroTwoEightOneOneZeropSixOneJThreeSevenknZCyt
Non-interest Bearing Liabilities Non-interest Bearing Liabilities 4 | 5,456,000 avxl_NoninterestBearingLiabilitiesZeroTwoEightOneOneZerorTlGQzZqLLDf
Non-interest Bearing Liabilities Non-interest Bearing Liabilities 5 | 133,727 avxl_NoninterestBearingLiabilitiesZeroTwoEightOneOneZerohThreeFwTsnvtbRy
Non-interest Bearing Liabilities Non-interest Bearing Liabilities 6 | $ 5,719,727 avxl_NoninterestBearingLiabilitiesZeroTwoEightOneOneZeroRtgKNineSixSixSixOnekdThree

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- Definition Non-interest Bearing Liabilities Non-interest Bearing Liabilities 2 + References No definition available. + Details
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- Definition Non-interest Bearing Liabilities Non-interest Bearing Liabilities 5 + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition Non-interest Bearing Liabilities Non-interest Bearing Liabilities 1 + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | na
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- Definition Non-interest Bearing Liabilities Non-interest Bearing Liabilities 3 + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition Non-interest Bearing Liabilities Non-interest Bearing Liabilities 6 + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition Non-interest Bearing Liabilities Non-interest Bearing Liabilities 4 + References No definition available. + Details
Name: | avxl_NoninterestBearingLiabilitiesZeroTwoEightOneOneZerorTlGQzZqLLDf
Namespace Prefix: | avxl_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration