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.

No definition available.

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

Other Income (Details Narrative) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
Other Income (Details Narrative) - USD ($)	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Sep. 30, 2017
Grant income	$ 74,527		$ 149,055
Clinical Study Grant [Member]
Grant income					$ 597,886