Milestone amount payable.

No definition available.

Name:	artv_MilestoneAmountPayable
Namespace Prefix:	artv_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Milestone amount recognized.

+ References

No definition available.

+ Details

Name:	artv_MilestoneAmountRecognized
Namespace Prefix:	artv_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Milestone payment receivable.

+ References

No definition available.

+ Details

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

- Definition

Number of product units for which the option has been excercised by the company.

+ References

No definition available.

+ Details

Name:	artv_NumberOfProductUnitsForWhichTheOptionHasBeenExcercisedByTheCompany
Namespace Prefix:	artv_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Receipt from the counterparty.

+ References

No definition available.

+ Details

Name:	artv_ReceiptFromTheCounterparty
Namespace Prefix:	artv_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Research and development expenses reimbursed.

+ References

No definition available.

+ Details

Name:	artv_ResearchAndDevelopmentExpensesReimbursed
Namespace Prefix:	artv_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Royalty percentage to be paid by the counterparty.

+ References

No definition available.

+ Details

Name:	artv_RoyaltyPercentageToBePaidByTheCounterparty
Namespace Prefix:	artv_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-2

+ Details

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

- 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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 808
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479402/808-10-50-1

+ Details

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

- Definition

Amount, after allowance, of receivables classified as other, due within one year or the operating cycle, if longer.

+ References

No definition available.

+ Details

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

- Definition

Amount of revenue that is not accounted for under Topic 606.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(1))
-SubTopic 10
-Topic 220
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

+ Details

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

- Definition

Amount of expense related to royalty payments under a contractual arrangement such as payment for mineral and drilling rights and use of technology or intellectual property.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(3))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

+ Details

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

- Details

Name:	us-gaap_TypeOfArrangementAxis=artv_OptionAndLicenseAgreementWithGcCellMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=artv_AbOneHundredAndOneSelectedProductLicenseAgreementWithGcCellMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	artv_TrancheAxis=artv_DevelopmentMilestoneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	artv_TrancheAxis=artv_SalesMilestoneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=artv_AbTwoHundredAndOneSelectedProductLicenseAgreementWithGcCellMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=artv_AbTwoHundredAndFiveSelectedProductLicenseAgreementWithGcCellMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Collaboration and License Agreements - Additional Information (Detail)		3 Months Ended		6 Months Ended
	Feb. 28, 2022 USD ($)	Jun. 30, 2026 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2026 USD ($) Units	Jun. 30, 2025 USD ($)	Dec. 31, 2025 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Other receivable current		$ 141,000		$ 141,000		$ 67,000
Option And License Agreement With GC Cell [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Number of products units for which the option has been exercised by the company \| Units				4
Royalty percentage to be paid by the counterparty				50.00%
AB-101 Selected Product License Agreement with GC cell [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Royalty percentage to be paid by the counterparty	50.00%
AB-101 Selected Product License Agreement with GC cell [Member] \| Development milestone [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Milestone amount payable	$ 22,000,000
AB-101 Selected Product License Agreement with GC cell [Member] \| Sales milestone [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Milestone amount payable	$ 55,000,000
Milestone Amount Recognized				$ 0
Royaly expenses recognized				0
AB-201 Selected Product License Agreement with GC cell [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Royalty percentage to be paid by the counterparty	50.00%
Revenue not from contract with customer		0	$ 0	0	$ 0
Accounts receivable net current		0		0		0
AB-201 Selected Product License Agreement with GC cell [Member] \| Development milestone [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Milestone amount payable	$ 25,000,000
Milestone payment receivable							$ 1,800,000
AB-201 Selected Product License Agreement with GC cell [Member] \| Sales milestone [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Milestone amount payable	$ 55,000,000
AB-205 Selected Product License Agreement with GC cell [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Milestone Amount Recognized				0
Royaly expenses recognized				0
Accounts receivable net current								$ 2,500,000
Research and development expenses reimbursed		0	0	0	0
Other receivable current		0		0		$ 0
Receipt from the counterparty		$ 0	$ 0	$ 0	$ 0
AB-205 Selected Product License Agreement with GC cell [Member] \| Development milestone [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Milestone amount payable								29,500,000
AB-205 Selected Product License Agreement with GC cell [Member] \| Sales milestone [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Milestone payment receivable								$ 28,000,000