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v2.4.1.9

Subsequent Events (Narrative) (Details) (USD $) | 3 Months Ended
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Dec. 31, 2014
Subsequent Events 1 | 1,636,096 avxl_SubsequentEventsZeroTwoSixEightEightZeronRThtTwobkDzSevenC
Subsequent Events 2 | $ 409,024 avxl_SubsequentEventsZeroTwoSixEightEightZeroJmEightpTwoZMlLXxEight
Subsequent Events 3 | $ 0.25 avxl_SubsequentEventsZeroTwoSixEightEightZerokEightykvDSixGCJLS

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- Definition Subsequent Events 2 + References No definition available. + Details
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Namespace Prefix: | avxl_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Subsequent Events 3 + References No definition available. + Details
Name: | avxl_SubsequentEventsZeroTwoSixEightEightZerokEightykvDSixGCJLS
Namespace Prefix: | avxl_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Subsequent Events 1 + References No definition available. + Details
Name: | avxl_SubsequentEventsZeroTwoSixEightEightZeronRThtTwobkDzSevenC
Namespace Prefix: | avxl_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration