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Deferred Grant Income (Details Narrative) - USD ($) | 12 Months Ended
--- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2014
Awarded grant funding amount |  | $ 286,455 |
Deferred grant income | $ 70,532 | 71,614 |
Grant income | 712,288 |  |
Research & Development Incentive Program (Australian Government) [Member] |  |  |
Grant income | $ 571,093 |  |

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- Definition Information related to funding of deferred income awarded grant. + References No definition available. + Details
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Namespace Prefix: | avxl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Information related to grants payable current. + References No definition available. + Details
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Namespace Prefix: | avxl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Revenue earned during the period from non-repayable sum of money awarded to an entity to carry out a specific purpose as provided in grant agreements. + References No definition available. + Details
Name: | avxl_NonOperatingIncomeFromGrant
Namespace Prefix: | avxl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |