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Other Income (Details Narrative) - USD ($) | 12 Months Ended
--- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2015
Grant income | $ 149,055 | $ 140,942 | $ 141,195 |
Research & Development Incentive Program (Australian Government) [Member] |  |  |  |
Grant income | 1,629,513 | 2,022,902 | 571,093 |
Clinical Study Grant [Member] |  |  |  |
Awarded grant funding amount | 149,055 |  |  |
Grant income |  | 597,886 |  |
Preclinical Study Grant [Member] |  |  |  |
Awarded grant funding amount |  | $ 140,942 | $ 141,195 |
Grant income |  |  |  | $ 286,455

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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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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
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Namespace Prefix: | avxl_
Data Type: | xbrli:monetaryItemType
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=avxl_ClinicalStudyGrantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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