Lease deposit refundable at expiration.

No definition available.

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Namespace Prefix:	artv_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Lease deposit refunded.

+ References

No definition available.

+ Details

Name:	artv_LeaseDepositRefunded
Namespace Prefix:	artv_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Noncancellable operating leases expiration year.

+ References

No definition available.

+ Details

Name:	artv_NoncancellableOperatingLeasesExpirationYear
Namespace Prefix:	artv_
Data Type:	xbrli:gYearItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of Lease Agreement

+ References

No definition available.

+ Details

Name:	artv_NumberOfLeaseAgreement
Namespace Prefix:	artv_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Operating lease commencement date.

+ References

No definition available.

+ Details

Name:	artv_OperatingLeaseCommencementDate
Namespace Prefix:	artv_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Operating lease expiration period.

+ References

No definition available.

+ Details

Name:	artv_OperatingLeaseExpirationPeriod
Namespace Prefix:	artv_
Data Type:	xbrli:gYearMonthItemType
Balance Type:	na
Period Type:	instant

- Definition

Operating sublease date of commencement of contract.

+ References

No definition available.

+ Details

Name:	artv_OperatingSubleaseDateOfCommencementOfContract
Namespace Prefix:	artv_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Operating sublease date of expiration of contract.

+ References

No definition available.

+ Details

Name:	artv_OperatingSubleaseDateOfExpirationOfContract
Namespace Prefix:	artv_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Operating sublease monthly rent.

+ References

No definition available.

+ Details

Name:	artv_OperatingSubleaseMonthlyRent
Namespace Prefix:	artv_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Area of land held.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

Area of a real estate property.

+ References

No definition available.

+ Details

Name:	us-gaap_AreaOfRealEstateProperty
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

Description of terms and conditions of option to extend lessee's operating lease. Includes, but is not limited to, information about option recognized as part of right-of-use asset and lease liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-3

+ Details

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

- Definition

Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-3

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of operating lease expense. Excludes sublease income.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 4
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479041/842-20-45-4

+ Details

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Namespace Prefix:	us-gaap_
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

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

- Definition

Investments which are not defined as or included in marketable (debt, equity, or other) securities whose use is restricted in whole or in part, generally by contractual agreements or regulatory requirements. For use in an unclassified balance sheet.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 954
-SubTopic 210
-Name Accounting Standards Codification
-Section 45
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477220/954-210-45-4

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 954
-SubTopic 210
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478600/954-210-50-2

+ Details

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

- Definition

The amount of an asset, typically cash, provided to a counterparty to provide certain assurance of performance by the entity pursuant to the terms of a written or oral agreement, such as a lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(17))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_SecurityDeposit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of sublease income excluding finance and operating lease expense.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 53
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479589/842-20-55-53

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-4

+ Details

Name:	us-gaap_SubleaseIncome
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Carrying amount as of the balance sheet date of improvements having a life longer than one year that were made for the benefit of one or more tenants.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(1)(d))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(1)(6))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

+ Details

Name:	us-gaap_TenantImprovements
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_LeaseContractualTermAxis=artv_ExecutiveDriveLeaseAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LeaseContractualTermAxis=artv_MorehouseLeaseAgreementMember
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Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LeaseContractualTermAxis=artv_ExploraLeaseAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LeaseContractualTermAxis=artv_EastgateLeaseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=artv_OfficeSpaceMember
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Data Type:	na
Balance Type:
Period Type:

- Details

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Commitments and Contingencies - Additional Information (Detail) $ in Millions		1 Months Ended			12 Months Ended
	Jul. 22, 2022 USD ($) ft²	Mar. 31, 2025 USD ($) LeaseAgreement	Aug. 31, 2022 USD ($)	Jun. 30, 2021 USD ($) ft²	Dec. 31, 2025 USD ($) ft²	Dec. 31, 2024 USD ($)	Oct. 31, 2021 USD ($)
Other Commitments [Line Items]
Sublease income					$ 0.8	$ 0.8
Noncancellable operating leases expiration year					2029
Lessee, Operating Lease, Option to Extend					option to renew for five additional years
Executive Drive Lease [Member]
Other Commitments [Line Items]
Operating lease expiration period					2025-12
Area of lease agreement \| ft²					13,405
Operating lease commencement date					Dec. 23, 2019
Operating lease term					6 years
Operating lease rent expense					$ 2.8
Lease security deposit					0.4
Lease deposit refunded							$ 0.2
Lease deposit refundable at expiration					$ 0.2
Morehouse Lease [Member]
Other Commitments [Line Items]
Area of lease agreement \| ft²				51,621
Operating lease term				88 months
Operating lease rent expense				$ 23.2
Tenant improvement allowance				12.3
Lessee restricted letter of credit				$ 0.2
Explora Lease [Member]
Other Commitments [Line Items]
Operating lease term			36 months
Operating lease rent expense			$ 0.8
Eastgate Lease [Member]
Other Commitments [Line Items]
Operating lease commencement date		Mar. 01, 2025
Operating lease term		54 months
Operating lease rent expense		$ 0.5
Number of Lease Agreement \| LeaseAgreement		2
Office space [Member]
Other Commitments [Line Items]
Area of sublessee \| ft²	13,405
Operating sublease monthly rent	$ 2.6
Office space [Member] \| Minimum [Member]
Other Commitments [Line Items]
Operating sublease date of commencement of contract	Aug. 01, 2022
Office space [Member] \| Maximum [Member]
Other Commitments [Line Items]
Operating sublease expirary date of contract	Dec. 31, 2025