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Other Income (Details Narrative) - USD ($) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Mar. 31, 2019 | Mar. 31, 2018 | Sep. 30, 2017
Grant income | $ 74,527 |  | $ 149,055 |  |
Clinical Study Grant [Member] |  |  |  |  |
Grant income |  |  |  |  | $ 597,886

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