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Schedule of Stockholders' Equity Note, Warrants or Rights, Activity (Details) (USD $) | 12 Months Ended
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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

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- Definition Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights, Activity 9 + References No definition available. + Details
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