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Schedule of Fair Value of Liabilities Activity (Details) (USD $) | 3 Months Ended | 12 Months Ended
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Dec. 31, 2014 | Sep. 30, 2014
Non-interest Bearing Liabilities Schedule Of Fair Value Of Liabilities Activity 1 |  | $ 904,000 avxl_ScheduleOfFairValueOfLiabilitiesActivityZeroTwoSixFourOneThreeOneTwoThreeSSixNqpOneSixVKEightfT
Non-interest Bearing Liabilities Schedule Of Fair Value Of Liabilities Activity 2 |  | 0 avxl_ScheduleOfFairValueOfLiabilitiesActivityZeroTwoSixFourOneThreeOneTwoThreeHNinesCfSevengEightVMbT
Non-interest Bearing Liabilities Schedule Of Fair Value Of Liabilities Activity 3 |  | 8,277,000 avxl_ScheduleOfFairValueOfLiabilitiesActivityZeroTwoSixFourOneThreeOneTwoThreeVpnSVgSevencVRVn
Non-interest Bearing Liabilities Schedule Of Fair Value Of Liabilities Activity 4 |  | 919,000 avxl_ScheduleOfFairValueOfLiabilitiesActivityZeroTwoSixFourOneThreeOneTwoThreeThreeSixxtTwoHQVRnJK
Non-interest Bearing Liabilities Schedule Of Fair Value Of Liabilities Activity 5 |  | (2,956,000)avxl_ScheduleOfFairValueOfLiabilitiesActivityZeroTwoSixFourOneThreeOneTwoThreeThreeOnezmyCZeroTwfHv
Non-interest Bearing Liabilities Schedule Of Fair Value Of Liabilities Activity 6 |  | (15,000)avxl_ScheduleOfFairValueOfLiabilitiesActivityZeroTwoSixFourOneThreeOneTwoThreePBEightXCNsNineNineFiveld
Non-interest Bearing Liabilities Schedule Of Fair Value Of Liabilities Activity 7 |  | (221,000)avxl_ScheduleOfFairValueOfLiabilitiesActivityZeroTwoSixFourOneThreeOneTwoThreeZqHbSNinemQSZcOne
Non-interest Bearing Liabilities Schedule Of Fair Value Of Liabilities Activity 8 |  | 0 avxl_ScheduleOfFairValueOfLiabilitiesActivityZeroTwoSixFourOneThreeOneTwoThreeSevenTwzWPZeroZerovSNm
Non-interest Bearing Liabilities Schedule Of Fair Value Of Liabilities Activity 9 |  | (548,000)avxl_ScheduleOfFairValueOfLiabilitiesActivityZeroTwoSixFourOneThreeOneTwoThreecLQlqLFiveSeventJGZ
Non-interest Bearing Liabilities Schedule Of Fair Value Of Liabilities Activity 10 |  | 0 avxl_ScheduleOfFairValueOfLiabilitiesActivityZeroTwoSixFourOneThreeOneTwoThreergXmXThreeRHEightyThreep
Non-interest Bearing Liabilities Schedule Of Fair Value Of Liabilities Activity 11 |  | 5,456,000 avxl_ScheduleOfFairValueOfLiabilitiesActivityZeroTwoSixFourOneThreeOneTwoThreeZeroGWRvyygFyGt
Non-interest Bearing Liabilities Schedule Of Fair Value Of Liabilities Activity 12 |  | 904,000 avxl_ScheduleOfFairValueOfLiabilitiesActivityZeroTwoSixFourOneThreeOneTwoThreefGGykZeroGVgGmX
Non-interest Bearing Liabilities Schedule Of Fair Value Of Liabilities Activity 1 | 5,456,000 avxl_ScheduleOfFairValueOfLiabilitiesActivityZeroTwoSixEightEightZerowrSixlmPHcSevenlMW |
Non-interest Bearing Liabilities Schedule Of Fair Value Of Liabilities Activity 2 | 904,000 avxl_ScheduleOfFairValueOfLiabilitiesActivityZeroTwoSixEightEightZeroNineZBbrVZqrNinehT |
Non-interest Bearing Liabilities Schedule Of Fair Value Of Liabilities Activity 3 | 527,000 avxl_ScheduleOfFairValueOfLiabilitiesActivityZeroTwoSixEightEightZeroZEightgHsSEighthcxFiveh |
Non-interest Bearing Liabilities Schedule Of Fair Value Of Liabilities Activity 4 | 8,277,000 avxl_ScheduleOfFairValueOfLiabilitiesActivityZeroTwoSixEightEightZeroPpSevenNineFFThreeFourcbrm |
Non-interest Bearing Liabilities Schedule Of Fair Value Of Liabilities Activity 5 | (2,000)avxl_ScheduleOfFairValueOfLiabilitiesActivityZeroTwoSixEightEightZeroTMZZFttThreeyXbN |
Non-interest Bearing Liabilities Schedule Of Fair Value Of Liabilities Activity 6 | (2,956,000)avxl_ScheduleOfFairValueOfLiabilitiesActivityZeroTwoSixEightEightZeroTTwoJNnpTwoHTwoFouryT |
Non-interest Bearing Liabilities Schedule Of Fair Value Of Liabilities Activity 7 | 0 avxl_ScheduleOfFairValueOfLiabilitiesActivityZeroTwoSixEightEightZeroTgffTwovvGhZQd |
Non-interest Bearing Liabilities Schedule Of Fair Value Of Liabilities Activity 8 | (221,000)avxl_ScheduleOfFairValueOfLiabilitiesActivityZeroTwoSixEightEightZerosNineWXvPwqPFourTwoh |
Non-interest Bearing Liabilities Schedule Of Fair Value Of Liabilities Activity 9 | (1,043,000)avxl_ScheduleOfFairValueOfLiabilitiesActivityZeroTwoSixEightEightZerocrOneRngwcrLSixl |
Non-interest Bearing Liabilities Schedule Of Fair Value Of Liabilities Activity 10 | (548,000)avxl_ScheduleOfFairValueOfLiabilitiesActivityZeroTwoSixEightEightZeroQzqKcpqTsmwG |
Non-interest Bearing Liabilities Schedule Of Fair Value Of Liabilities Activity 11 | 4,938,000 avxl_ScheduleOfFairValueOfLiabilitiesActivityZeroTwoSixEightEightZeroSixNineSevenFourmgrCDrGb |
Non-interest Bearing Liabilities Schedule Of Fair Value Of Liabilities Activity 12 | $ 5,456,000 avxl_ScheduleOfFairValueOfLiabilitiesActivityZeroTwoSixEightEightZeroFgQqHSlThreeSevenyThreeOne |

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