Related Party Transactions - Additional Information (Details) - USD ($)	3 Months Ended
Apr. 03, 2021	Mar. 28, 2020	Jan. 02, 2021
Related Party Transaction [Line Items]
Management fees and expenses	$ 900,000	$ 800,000
Amounts owed in connection with advisory services agreements	0		$ 1,600,000
Fees for revenue cycle vendor eligibility and clearing house billing services	100,000	$ 100,000
Amount owed to revenue cycle vendor	$ 0		$ 0
First Lien Term Loan
Related Party Transaction [Line Items]
Shareholders ownership percentage	5.70%

Advisory services expense outstanding.

No definition available.

Name:	avah_AdvisoryServicesExpenseOutstanding
Namespace Prefix:	avah_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Ownership interest in revenue cycle vendor eligibility and clearing house billing services.

+ References

No definition available.

+ Details

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Namespace Prefix:	avah_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Ownership interest in revenue cycle vendor eligibility and clearing house billing services outstanding.

+ References

No definition available.

+ Details

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Namespace Prefix:	avah_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage of debt held by shareholders.

+ References

No definition available.

+ Details

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Namespace Prefix:	avah_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of expenses related to the managing member or general partner for management of the day-to-day business functions of the limited liability company (LLC) or limited partnership (LP).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Details

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