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Promissory Notes Payable (Narrative) (Details) | 6 Months Ended
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Mar. 31, 2015 USD ($) D | Mar. 31, 2015 CAD
Promissory Notes Payable 1 |  | 100,000 avxl_PromissoryNotesPayableZeroTwoEightOneOneZeroflQFiveQqzXhBNinef
Promissory Notes Payable 2 | 12.00%avxl_PromissoryNotesPayableZeroTwoEightOneOneZerovyNineSixHSevenvFLCzZero | 12.00%avxl_PromissoryNotesPayableZeroTwoEightOneOneZerovyNineSixHSevenvFLCzZero
Promissory Notes Payable 3 |  | 86,677 avxl_PromissoryNotesPayableZeroTwoEightOneOneZerogCTwoZLFiverMFSeventSeven
Promissory Notes Payable 4 | 12.00%avxl_PromissoryNotesPayableZeroTwoEightOneOneZeroPTwolsEightEightkhtThreemFive | 12.00%avxl_PromissoryNotesPayableZeroTwoEightOneOneZeroPTwolsEightEightkhtThreemFive
Promissory Notes Payable 5 |  | 27,639 avxl_PromissoryNotesPayableZeroTwoEightOneOneZeroWCJPQgxJvNtFive
Promissory Notes Payable 6 | 12.00%avxl_PromissoryNotesPayableZeroTwoEightOneOneZeroWlPwVSevenCNThreeXks | 12.00%avxl_PromissoryNotesPayableZeroTwoEightOneOneZeroWlPwVSevenCNThreeXks
Promissory Notes Payable 7 | 10 avxl_PromissoryNotesPayableZeroTwoEightOneOneZeromDKFHFiveXyTZNQ | 10 avxl_PromissoryNotesPayableZeroTwoEightOneOneZeromDKFHFiveXyTZNQ
Promissory Notes Payable 8 | 100 avxl_PromissoryNotesPayableZeroTwoEightOneOneZerogSixThreeNineVXggMDvb |
Promissory Notes Payable 9 | $ 500 avxl_PromissoryNotesPayableZeroTwoEightOneOneZerokkOneVDSevenFFourZKxS |

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- Definition Promissory Notes Payable 1 + References No definition available. + Details
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Namespace Prefix: | avxl_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Promissory Notes Payable 3 + References No definition available. + Details
Name: | avxl_PromissoryNotesPayableZeroTwoEightOneOneZerogCTwoZLFiverMFSeventSeven
Namespace Prefix: | avxl_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Promissory Notes Payable 8 + References No definition available. + Details
Name: | avxl_PromissoryNotesPayableZeroTwoEightOneOneZerogSixThreeNineVXggMDvb
Namespace Prefix: | avxl_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Promissory Notes Payable 9 + References No definition available. + Details
Name: | avxl_PromissoryNotesPayableZeroTwoEightOneOneZerokkOneVDSevenFFourZKxS
Namespace Prefix: | avxl_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Promissory Notes Payable 7 + References No definition available. + Details
Name: | avxl_PromissoryNotesPayableZeroTwoEightOneOneZeromDKFHFiveXyTZNQ
Namespace Prefix: | avxl_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition Promissory Notes Payable 4 + References No definition available. + Details
Name: | avxl_PromissoryNotesPayableZeroTwoEightOneOneZeroPTwolsEightEightkhtThreemFive
Namespace Prefix: | avxl_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Promissory Notes Payable 2 + References No definition available. + Details
Name: | avxl_PromissoryNotesPayableZeroTwoEightOneOneZerovyNineSixHSevenvFLCzZero
Namespace Prefix: | avxl_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Promissory Notes Payable 5 + References No definition available. + Details
Name: | avxl_PromissoryNotesPayableZeroTwoEightOneOneZeroWCJPQgxJvNtFive
Namespace Prefix: | avxl_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Promissory Notes Payable 6 + References No definition available. + Details
Name: | avxl_PromissoryNotesPayableZeroTwoEightOneOneZeroWlPwVSevenCNThreeXks
Namespace Prefix: | avxl_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration