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Schedule of Stockholders' Equity Note, Warrants or Rights (Details) (USD $) | 3 Months Ended | 12 Months Ended
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Dec. 31, 2014 | Sep. 30, 2014
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights 1 |  | $ 6,448,966 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsZeroTwoSixFourOneThreeOneTwoThreelOnehTdWSixtpgJOne
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights 2 |  | 0.75 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsZeroTwoSixFourOneThreeOneTwoThreeVTfTHnvpZerodkW
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights 3 |  | 500,000 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsZeroTwoSixFourOneThreeOneTwoThreeKTpFourQdSCNinehnJ
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights 4 |  | 0.75 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsZeroTwoSixFourOneThreeOneTwoThreeZerobmSixzFNineJhTwoyF
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights 5 |  | 120,000 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsZeroTwoSixFourOneThreeOneTwoThreedQwmsXSevenQtprR
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights 6 |  | 1.00 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsZeroTwoSixFourOneThreeOneTwoThreeNgvNXBgCQRfEight
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights 7 |  | 33,833,333 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsZeroTwoSixFourOneThreeOneTwoThreeWVVOneBXszTwSh
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights 8 |  | 0.30 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsZeroTwoSixFourOneThreeOneTwoThreewHVcNZLNGGNineNine
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights 9 |  | 33,833,333 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsZeroTwoSixFourOneThreeOneTwoThreeZWwctSQQmJNf
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights 10 |  | 0.42 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsZeroTwoSixFourOneThreeOneTwoThreeMkwNFiveTwoTVZBtm
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights 11 |  | 180,000 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsZeroTwoSixFourOneThreeOneTwoThreeEightDWTXNsJlFourFourh
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights 12 |  | 0.31 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsZeroTwoSixFourOneThreeOneTwoThreeLPrQzxlZHdlJ
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights 13 |  | 74,915,632 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsZeroTwoSixFourOneThreeOneTwoThreeSevenZeroTwoCSRWThnzD
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights 1 | 6,448,966 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsZeroTwoSixEightEightZeroEightJPZzGWzxyrR |
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights 2 | 0.75 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsZeroTwoSixEightEightZerowThreeLrEightOneqmTxvJ |
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights 3 | 500,000 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsZeroTwoSixEightEightZeroWDTwoVmTSixMSevenvRFour |
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights 4 | 0.75 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsZeroTwoSixEightEightZeroZerosSevensfnJTlmThreef |
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights 5 | 120,000 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsZeroTwoSixEightEightZeroQMrJqpSixFFwTSix |
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights 6 | 1.00 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsZeroTwoSixEightEightZeroFouryTCQSixNyhqTw |
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights 7 | 33,833,333 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsZeroTwoSixEightEightZeroTNineXGqEightZeroHTWWZero |
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights 8 | 0.30 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsZeroTwoSixEightEightZeroVxCTwoSevenFivezFourSixxrEight |
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights 9 | 33,833,333 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsZeroTwoSixEightEightZeroZeroZeroEightymSixHkTZJQ |
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights 10 | 0.42 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsZeroTwoSixEightEightZeroCbZfBCWkSwgR |
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights 11 | 180,000 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsZeroTwoSixEightEightZerorZeroTtTwofLFourSevenQDb |
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights 12 | 0.31 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsZeroTwoSixEightEightZeroQqHNTnhSixWkSixd |
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights 13 | 2,000,000 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsZeroTwoSixEightEightZeroXVxSixpwNineFiveVFivezD |
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights 14 | 0.30 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsZeroTwoSixEightEightZeroVWpOnebBZeroSixNFrSix |
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights 15 | 2,000,000 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsZeroTwoSixEightEightZeroGnFivehQWzTnyrX |
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights 16 | 0.42 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsZeroTwoSixEightEightZerottGwcJTNinePSRl |
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights 17 | 250,000 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsZeroTwoSixEightEightZeroFiveBQZOneEightKppDLx |
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights 18 | 0.19 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsZeroTwoSixEightEightZeroPgGxWyEightRgzTOne |
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights 19 | 50,000 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsZeroTwoSixEightEightZeroThreeQZKbLtkqZeroThreeQ |
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights 20 | 0.31 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsZeroTwoSixEightEightZeropHZOneThreeyHTmFTQ |
Commitments Schedule Of Stockholders' Equity Note, Warrants Or Rights 21 | $ 79,215,632 avxl_ScheduleOfStockholdersaposEquityNoteWarrantsOrRightsZeroTwoSixEightEightZeroWQXqKJyhSnrd |

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