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Other Income (Details Narrative) - USD ($)	3 Months Ended		12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Sep. 30, 2017
Grant income	$ 74,528
Clinical Study Grant [Member]
Grant income			$ 597,886

X

- Definition

Revenue earned during the period from non-repayable sum of money awarded to an entity to carry out a specific purpose as provided in grant agreements.

+ References

No definition available.

+ Details

Name:	avxl_NonOperatingIncomeFromGrant
Namespace Prefix:	avxl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	srt_ProductOrServiceAxis=avxl_ClinicalStudyGrantMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: