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Company Issuance of Share Purchase Warrants (Details) (USD $) | 3 Months Ended | 12 Months Ended
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Dec. 31, 2014 | Sep. 30, 2014
Non-interest Bearing Liabilities Company Issuance Of Share Purchase Warrants 1 |  | $ 33,333,333 avxl_CompanyIssuanceOfSharePurchaseWarrantsZeroTwoSixFourOneThreeOneTwoThreeTvDXZSGOneXnZeroEight
Non-interest Bearing Liabilities Company Issuance Of Share Purchase Warrants 2 |  | 500,000 avxl_CompanyIssuanceOfSharePurchaseWarrantsZeroTwoSixFourOneThreeOneTwoThreefzWptVVhRpCQ
Non-interest Bearing Liabilities Company Issuance Of Share Purchase Warrants 3 |  | 33,833,333 avxl_CompanyIssuanceOfSharePurchaseWarrantsZeroTwoSixFourOneThreeOneTwoThreeFourfNineTFourBwDDQPX
Non-interest Bearing Liabilities Company Issuance Of Share Purchase Warrants 4 |  | 33,333,333 avxl_CompanyIssuanceOfSharePurchaseWarrantsZeroTwoSixFourOneThreeOneTwoThreesxwVtDEightWtSixSevenf
Non-interest Bearing Liabilities Company Issuance Of Share Purchase Warrants 5 |  | 500,000 avxl_CompanyIssuanceOfSharePurchaseWarrantsZeroTwoSixFourOneThreeOneTwoThreeXVJNineFscJSbEightZ
Non-interest Bearing Liabilities Company Issuance Of Share Purchase Warrants 6 |  | 33,833,333 avxl_CompanyIssuanceOfSharePurchaseWarrantsZeroTwoSixFourOneThreeOneTwoThreerZerogKFJQcdWFL
Non-interest Bearing Liabilities Company Issuance Of Share Purchase Warrants 7 |  | 66,666,666 avxl_CompanyIssuanceOfSharePurchaseWarrantsZeroTwoSixFourOneThreeOneTwoThreeTTSevenHVVSixNineTHRs
Non-interest Bearing Liabilities Company Issuance Of Share Purchase Warrants 8 |  | 1,000,000 avxl_CompanyIssuanceOfSharePurchaseWarrantsZeroTwoSixFourOneThreeOneTwoThreezPSevenTSQVFourqXQs
Non-interest Bearing Liabilities Company Issuance Of Share Purchase Warrants 9 |  | 67,666,666 avxl_CompanyIssuanceOfSharePurchaseWarrantsZeroTwoSixFourOneThreeOneTwoThreewbRxyhFGFFTq
Non-interest Bearing Liabilities Company Issuance Of Share Purchase Warrants 1 | 33,333,333 avxl_CompanyIssuanceOfSharePurchaseWarrantsZeroTwoSixEightEightZeroVOneTwobzZNzSixqXOne |
Non-interest Bearing Liabilities Company Issuance Of Share Purchase Warrants 2 | 500,000 avxl_CompanyIssuanceOfSharePurchaseWarrantsZeroTwoSixEightEightZeroqyOnemNctGdSSixG |
Non-interest Bearing Liabilities Company Issuance Of Share Purchase Warrants 3 | 33,833,333 avxl_CompanyIssuanceOfSharePurchaseWarrantsZeroTwoSixEightEightZeroRyXpLSixvwwLyy |
Non-interest Bearing Liabilities Company Issuance Of Share Purchase Warrants 4 | 33,333,333 avxl_CompanyIssuanceOfSharePurchaseWarrantsZeroTwoSixEightEightZeroQVdTFourCJTbThreeSZero |
Non-interest Bearing Liabilities Company Issuance Of Share Purchase Warrants 5 | 500,000 avxl_CompanyIssuanceOfSharePurchaseWarrantsZeroTwoSixEightEightZerohstSevengrcWPTmP |
Non-interest Bearing Liabilities Company Issuance Of Share Purchase Warrants 6 | 33,833,333 avxl_CompanyIssuanceOfSharePurchaseWarrantsZeroTwoSixEightEightZeroThreeXpfryRwpKXC |
Non-interest Bearing Liabilities Company Issuance Of Share Purchase Warrants 7 | 66,666,666 avxl_CompanyIssuanceOfSharePurchaseWarrantsZeroTwoSixEightEightZeroGThreeWCBbPRxbJB |
Non-interest Bearing Liabilities Company Issuance Of Share Purchase Warrants 8 | 1,000,000 avxl_CompanyIssuanceOfSharePurchaseWarrantsZeroTwoSixEightEightZeroHcskLPVnlThreeFiveg |
Non-interest Bearing Liabilities Company Issuance Of Share Purchase Warrants 9 | $ 67,666,666 avxl_CompanyIssuanceOfSharePurchaseWarrantsZeroTwoSixEightEightZeropxBfBMsFourFiveTLFour |

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