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Commitments and Contingencies - Employment Agreements (Details)	Jun. 30, 2021 USD ($)
Executive Officers
Employment Agreements
Maximum aggregate severance payments	$ 930,000

X

- Definition

The maximum aggregate severance payments payable to executive officers under the terms of employment agreements.

+ References

No definition available.

+ Details

Name:	anvs_MaximumAggregateSeverancePayments
Namespace Prefix:	anvs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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- References

No definition available.

+ Details

Name:	us-gaap_DeferredCompensationArrangementsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_TitleOfIndividualAxis=srt_ExecutiveOfficerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: