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Schedule of Stockholders' Equity Note, Warrants or Rights, Activity (Details) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights, Activity 1 |  | $ 4,250,141 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsActivityZeroTwoSixFourOneThreeOneTwoThreedwBThreeGnLZeroNwzH
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights, Activity 2 |  | 1.16 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsActivityZeroTwoSixFourOneThreeOneTwoThreeqsDCmQhkRynB
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights, Activity 3 |  | (1,549,628)avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsActivityZeroTwoSixFourOneThreeOneTwoThreeNtDbbZvJQppn
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights, Activity 4 |  | 2.56 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsActivityZeroTwoSixFourOneThreeOneTwoThreeVzThreeQrlFykgdL
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights, Activity 5 |  | 6,448,966 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsActivityZeroTwoSixFourOneThreeOneTwoThreelOneWvXFiveZtGNineFiveL
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights, Activity 6 |  | 0.75 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsActivityZeroTwoSixFourOneThreeOneTwoThreenNCrbtNinevhHZerop
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights, Activity 7 |  | 9,149,479 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsActivityZeroTwoSixFourOneThreeOneTwoThreeWrpmTWdJQfBNine
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights, Activity 8 |  | 0.75 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsActivityZeroTwoSixFourOneThreeOneTwoThreetBZerolXwwNineFFiveGC
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights, Activity 9 |  | (2,700,513)avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsActivityZeroTwoSixFourOneThreeOneTwoThreeBhbRgpmSixlcfFive
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights, Activity 10 |  | 0.75 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsActivityZeroTwoSixFourOneThreeOneTwoThreeKNineQHByySevenQRNineg
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights, Activity 11 |  | 68,466,666 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsActivityZeroTwoSixFourOneThreeOneTwoThreeDSevenCFourgNineTDFiveHxFive
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights, Activity 12 |  | 0.36 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsActivityZeroTwoSixFourOneThreeOneTwoThreeMZTKqGHZSevenDNn
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights, Activity 13 |  | 74,915,632 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsActivityZeroTwoSixFourOneThreeOneTwoThreefOneTwstSixfksFZero
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights, Activity 14 |  | 0.40 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsActivityZeroTwoSixFourOneThreeOneTwoThreeNSixWysrQcxThreeZFive
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights, Activity 1 | 9,149,479 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsActivityZeroTwoSixEightEightZeroBSevenwXFivegfNXDnm |
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights, Activity 2 | 0.75 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsActivityZeroTwoSixEightEightZeroFourFourEightMFourHSevenLNinezqq |
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights, Activity 3 | (2,700,513)avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsActivityZeroTwoSixEightEightZeroNPhPNHVzNinefkm |
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights, Activity 4 | 0.75 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsActivityZeroTwoSixEightEightZeroqNGwZHdHkMXl |
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights, Activity 5 | 68,466,666 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsActivityZeroTwoSixEightEightZerowGkEightTfpvNineSixnq |
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights, Activity 6 | 0.36 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsActivityZeroTwoSixEightEightZerofcCRhdwkrSMX |
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights, Activity 7 | 74,915,632 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsActivityZeroTwoSixEightEightZerozFFourSixDWMEightZnCL |
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights, Activity 8 | 0.40 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsActivityZeroTwoSixEightEightZeroHvJQgFiveSevenhfpCg |
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights, Activity 9 | 4,300,000 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsActivityZeroTwoSixEightEightZeroFOnesPFEightFEightgSixTwoX |
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights, Activity 10 | 0.35 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsActivityZeroTwoSixEightEightZerowcBqfRFourFourLTfG |
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights, Activity 11 | $ 79,215,632 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsActivityZeroTwoSixEightEightZeroFvKKwTfZeromSNNine |
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights, Activity 12 | 0.39 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsActivityZeroTwoSixEightEightZerokbqgbThreeMXhCwQ |

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