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Promissory Notes Payable (Narrative) (Details) | 3 Months Ended
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Dec. 31, 2014 USD ($) D | Dec. 31, 2014 CAD
Promissory Notes Payable 1 |  | 100,000 avxl_PromissoryNotesPayableZeroTwoSixEightEightZerofrzxsrCPdFiveCp
Promissory Notes Payable 2 | 12.00%avxl_PromissoryNotesPayableZeroTwoSixEightEightZerodFourFfFTyQLDPThree | 12.00%avxl_PromissoryNotesPayableZeroTwoSixEightEightZerodFourFfFTyQLDPThree
Promissory Notes Payable 3 |  | 86,677 avxl_PromissoryNotesPayableZeroTwoSixEightEightZeroJkrQRHLJpNinepSeven
Promissory Notes Payable 4 | 12.00%avxl_PromissoryNotesPayableZeroTwoSixEightEightZeroFQlrmtgbkvTwoZ | 12.00%avxl_PromissoryNotesPayableZeroTwoSixEightEightZeroFQlrmtgbkvTwoZ
Promissory Notes Payable 5 |  | 27,639 avxl_PromissoryNotesPayableZeroTwoSixEightEightZeroPztgTNSixlydmT
Promissory Notes Payable 6 | 12.00%avxl_PromissoryNotesPayableZeroTwoSixEightEightZerogRKBNinevwSFourBBl | 12.00%avxl_PromissoryNotesPayableZeroTwoSixEightEightZerogRKBNinevwSFourBBl
Promissory Notes Payable 7 | 10 avxl_PromissoryNotesPayableZeroTwoSixEightEightZeronKmSixKpFZeroTlph | 10 avxl_PromissoryNotesPayableZeroTwoSixEightEightZeronKmSixKpFZeroTlph
Promissory Notes Payable 8 | 100 avxl_PromissoryNotesPayableZeroTwoSixEightEightZeroGkFRbwCZyHGd |
Promissory Notes Payable 9 | $ 500 avxl_PromissoryNotesPayableZeroTwoSixEightEightZeropfPsSevenptnfEightThreeN |

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

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

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

X
- Definition Promissory Notes Payable 8 + 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 6 + References No definition available. + Details
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Namespace Prefix: | avxl_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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

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

X
- Definition Promissory Notes Payable 9 + 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 5 + References No definition available. + Details
Name: | avxl_PromissoryNotesPayableZeroTwoSixEightEightZeroPztgTNSixlydmT
Namespace Prefix: | avxl_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration