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Derivative Liabilities (Tables) | 3 Months Ended | 15 Months Ended
--- | --- | ---
Dec. 31, 2013 | Dec. 31, 2013
Derivative Liabilities Activity [Table Text Block] |
|  |  | December31, |  |  | September30, |
|  |  | 2013 |  |  | 2013 |
| Balance, beginning of the period | $ | 904,000 |  | $ | - |
| Fair value at issuance of derivative liability |  | - |  |  | 919,000 |
| Change in fair value of derivative liability |  | (683,000 | ) |  | (15,000 | )
| Transfer to equity upon modification of warrant terms |  | (221,000 | ) |  | - |
| Balance, end of the period | $ | - |  | $ | 904,000 |
|  |  | 2013 |  |  | 2012 |
| Balance, beginning of the period | $ | - |  | $ | 67,500 |
| Fair value at issuance of derivative liability |  | 919,000 |  |  | - |
| Change in fair value of derivative liability |  | (15,000 | ) |  | (67,500 | )
| Balance, end of the period | $ | 904,000 |  | $ | - |

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- Definition Derivative Liabilities Activity + References No definition available. + Details
Name: | avxl_DerivativeliabilitiesactivityTableTextBlock
Namespace Prefix: | avxl_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration