Fair Value Measurements - Additional Information (Details) - USD ($)	12 Months Ended
Dec. 30, 2023	Dec. 31, 2022
Fair Value Disclosures [Abstract]
Fair Value, Assets, Level 1 to Level 2 Transfers		$ 0
Fair Value, Assets, Level 2 to Level 1 Transfers		0
Fair Value Asset Transfers Into Level 3		0
Fair Value Asset, Transfers out of Level 3		0
Fair Value, Liabilities, Level 1 to Level 2 Transfers	$ 0	0
Fair Value, Liabilities, Level 2 to Level 1 Transfers	0	0
Fair Value, Liability, Transfers Into Level 3	0	0
Fair Value, Liability, Transfers out of Level 3	$ 0	$ 0

Fair value assets level 1 to level 2 transfer amount.

No definition available.

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Namespace Prefix:	avah_
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Period Type:	instant

- Definition

Fair value assets level 2 to level 1 transfer amount.

+ References

No definition available.

+ Details

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

- Definition

Fair value liabilities level 1 to level 2 transfer amount.

+ References

No definition available.

+ Details

Name:	avah_FairValueLiabilitiesLevel1ToLevel2TransferAmount
Namespace Prefix:	avah_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Fair value liabilities level 2 To level 1 transfer amount.

+ References

No definition available.

+ Details

Name:	avah_FairValueLiabilitiesLevel2ToLevel1TransferAmount
Namespace Prefix:	avah_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

Name:	us-gaap_FairValueDisclosuresAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
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- Definition

Amount of transfers of financial instrument classified as a liability into level 3 of the fair value hierarchy.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

+ Details

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

- Definition

Amount of transfers of financial instrument classified as a liability out of level 3 of the fair value hierarchy.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of transfer of financial instrument classified as an asset into level 3 of the fair value hierarchy.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of transfers of financial instrument classified as an asset out of level 3 of the fair value hierarchy.

+ References

+ Details

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