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Fair Value of the Purchaser and Non-Purchaser Warrants at Issuance (Details) (USD $) | 6 Months Ended
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Mar. 31, 2015
Non-interest Bearing Liabilities Fair Value Of The Purchaser And Non-purchaser Warrants At Issuance 1 | 1.56%avxl_FairValueOfThePurchaserAndNonpurchaserWarrantsAtIssuanceZeroTwoEightOneOneZeroTwoyEightHgrTWcGEightM
Non-interest Bearing Liabilities Fair Value Of The Purchaser And Non-purchaser Warrants At Issuance 2 | 5.00 avxl_FairValueOfThePurchaserAndNonpurchaserWarrantsAtIssuanceZeroTwoEightOneOneZeroWZbbQRGVNineRMR
Non-interest Bearing Liabilities Fair Value Of The Purchaser And Non-purchaser Warrants At Issuance 3 | 97.16%avxl_FairValueOfThePurchaserAndNonpurchaserWarrantsAtIssuanceZeroTwoEightOneOneZeroJLzCTwoZeroSNineRTtz
Non-interest Bearing Liabilities Fair Value Of The Purchaser And Non-purchaser Warrants At Issuance 4 | 0.00%avxl_FairValueOfThePurchaserAndNonpurchaserWarrantsAtIssuanceZeroTwoEightOneOneZeroRgBTQThreemNRxFourk
Amendment Agreements [Member] |
Non-interest Bearing Liabilities Fair Value Of The Purchaser And Non-purchaser Warrants At Issuance 1 | 3.13%avxl_FairValueOfThePurchaserAndNonpurchaserWarrantsAtIssuanceZeroTwoEightOneOneZeroTwoPZMsFCssTSNine / avxl_NoninterestBearingLiabilitiesAxis = avxl_AmendmentAgreementsMember
Non-interest Bearing Liabilities Fair Value Of The Purchaser And Non-purchaser Warrants At Issuance 2 | 29.58 avxl_FairValueOfThePurchaserAndNonpurchaserWarrantsAtIssuanceZeroTwoEightOneOneZeroZOneBHJZXbSixDym / avxl_NoninterestBearingLiabilitiesAxis = avxl_AmendmentAgreementsMember
Non-interest Bearing Liabilities Fair Value Of The Purchaser And Non-purchaser Warrants At Issuance 3 | 100.71%avxl_FairValueOfThePurchaserAndNonpurchaserWarrantsAtIssuanceZeroTwoEightOneOneZeroSevenSbVXsqSevenTSevennt / avxl_NoninterestBearingLiabilitiesAxis = avxl_AmendmentAgreementsMember
Non-interest Bearing Liabilities Fair Value Of The Purchaser And Non-purchaser Warrants At Issuance 4 | 0.00%avxl_FairValueOfThePurchaserAndNonpurchaserWarrantsAtIssuanceZeroTwoEightOneOneZeroWmNFourSixSevenbHyrEightN / avxl_NoninterestBearingLiabilitiesAxis = avxl_AmendmentAgreementsMember
Embedded conversion options and warrants [Member] |
Non-interest Bearing Liabilities Fair Value Of The Purchaser And Non-purchaser Warrants At Issuance 1 | 30 avxl_FairValueOfThePurchaserAndNonpurchaserWarrantsAtIssuanceZeroTwoEightOneOneZeroCSfBFourDBhTsVK / avxl_NoninterestBearingLiabilitiesAxis = avxl_EmbeddedConversionOptionsAndWarrantsMember
Non-interest Bearing Liabilities Fair Value Of The Purchaser And Non-purchaser Warrants At Issuance 2 | 1.47%avxl_FairValueOfThePurchaserAndNonpurchaserWarrantsAtIssuanceZeroTwoEightOneOneZeroqmTTwoxhyySixFiveEightZero / avxl_NoninterestBearingLiabilitiesAxis = avxl_EmbeddedConversionOptionsAndWarrantsMember
Non-interest Bearing Liabilities Fair Value Of The Purchaser And Non-purchaser Warrants At Issuance 3 | 3.21%avxl_FairValueOfThePurchaserAndNonpurchaserWarrantsAtIssuanceZeroTwoEightOneOneZeroOneOneNineOnesCOnedqyDh / avxl_NoninterestBearingLiabilitiesAxis = avxl_EmbeddedConversionOptionsAndWarrantsMember
Non-interest Bearing Liabilities Fair Value Of The Purchaser And Non-purchaser Warrants At Issuance 4 | 24.19 avxl_FairValueOfThePurchaserAndNonpurchaserWarrantsAtIssuanceZeroTwoEightOneOneZeroSixNineFbqEightNineTrFKF / avxl_NoninterestBearingLiabilitiesAxis = avxl_EmbeddedConversionOptionsAndWarrantsMember
Non-interest Bearing Liabilities Fair Value Of The Purchaser And Non-purchaser Warrants At Issuance 5 | 29.48 avxl_FairValueOfThePurchaserAndNonpurchaserWarrantsAtIssuanceZeroTwoEightOneOneZeroLnTyPpmwNineFNT / avxl_NoninterestBearingLiabilitiesAxis = avxl_EmbeddedConversionOptionsAndWarrantsMember
Non-interest Bearing Liabilities Fair Value Of The Purchaser And Non-purchaser Warrants At Issuance 6 | 102.14%avxl_FairValueOfThePurchaserAndNonpurchaserWarrantsAtIssuanceZeroTwoEightOneOneZeronTWwMlTFiveKNinePr / avxl_NoninterestBearingLiabilitiesAxis = avxl_EmbeddedConversionOptionsAndWarrantsMember
Non-interest Bearing Liabilities Fair Value Of The Purchaser And Non-purchaser Warrants At Issuance 7 | 100.07%avxl_FairValueOfThePurchaserAndNonpurchaserWarrantsAtIssuanceZeroTwoEightOneOneZeromHpTlNineGFDZeroSK / avxl_NoninterestBearingLiabilitiesAxis = avxl_EmbeddedConversionOptionsAndWarrantsMember
Non-interest Bearing Liabilities Fair Value Of The Purchaser And Non-purchaser Warrants At Issuance 8 | 0.00%avxl_FairValueOfThePurchaserAndNonpurchaserWarrantsAtIssuanceZeroTwoEightOneOneZerobhmsqSWzdqFivet / avxl_NoninterestBearingLiabilitiesAxis = avxl_EmbeddedConversionOptionsAndWarrantsMember
Non-interest Bearing Liabilities Fair Value Of The Purchaser And Non-purchaser Warrants At Issuance 9 | 0.00%avxl_FairValueOfThePurchaserAndNonpurchaserWarrantsAtIssuanceZeroTwoEightOneOneZeroWnwQSwtgwTtEight / avxl_NoninterestBearingLiabilitiesAxis = avxl_EmbeddedConversionOptionsAndWarrantsMember

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