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Schedule of fair value of warrants assumption (Details) (USD $) | 12 Months Ended
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Sep. 30, 2014
Promissory Notes Payable Schedule Of Fair Value Of Warrants Assumption 1 | $ 0.61 avxl_ScheduleOfFairValueOfWarrantsAssumptionZeroTwoSixFourOneThreeOneTwoThreemOneXNineTSpZeroTwoQHV
Promissory Notes Payable Schedule Of Fair Value Of Warrants Assumption 2 | $ 0.75 avxl_ScheduleOfFairValueOfWarrantsAssumptionZeroTwoSixFourOneThreeOneTwoThreepgVSixnZeroyGTwoSNineT
Promissory Notes Payable Schedule Of Fair Value Of Warrants Assumption 3 | 81.57%avxl_ScheduleOfFairValueOfWarrantsAssumptionZeroTwoSixFourOneThreeOneTwoThreetLZeroVKKsOneFvSevenc
Promissory Notes Payable Schedule Of Fair Value Of Warrants Assumption 4 | 0.28%avxl_ScheduleOfFairValueOfWarrantsAssumptionZeroTwoSixFourOneThreeOneTwoThreetFivePyGzKMNineVREight
Promissory Notes Payable Schedule Of Fair Value Of Warrants Assumption 5 | 0.00%avxl_ScheduleOfFairValueOfWarrantsAssumptionZeroTwoSixFourOneThreeOneTwoThreerrzBWchCFyzZero

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- Definition Promissory Notes Payable Schedule Of Fair Value Of Warrants Assumption 1 + References No definition available. + Details
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- Definition Promissory Notes Payable Schedule Of Fair Value Of Warrants Assumption 2 + 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 Schedule Of Fair Value Of Warrants Assumption 5 + References No definition available. + Details
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Namespace Prefix: | avxl_
Data Type: | num:percentItemType
Balance Type: | na
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- Definition Promissory Notes Payable Schedule Of Fair Value Of Warrants Assumption 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 Schedule Of Fair Value Of Warrants Assumption 3 + References No definition available. + Details
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Namespace Prefix: | avxl_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration