Class of warrant or right, purchase price of warrants or rights.

No definition available.

Name:	acrv_ClassOfWarrantOrRightPurchasePriceOfWarrantsOrRights
Namespace Prefix:	acrv_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Incurred additional development milestones.

+ References

No definition available.

+ Details

Name:	acrv_IncurredAdditionalDevelopmentMilestones
Namespace Prefix:	acrv_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Number of milestones achieved.

+ References

No definition available.

+ Details

Name:	acrv_NumberOfMilestonesAchieved
Namespace Prefix:	acrv_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of the number of shares outstanding.

+ References

No definition available.

+ Details

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Namespace Prefix:	acrv_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Pre-funded warrant notice period.

+ References

No definition available.

+ Details

Name:	acrv_PreFundedWarrantNoticePeriod
Namespace Prefix:	acrv_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Upfront payment.

+ References

No definition available.

+ Details

Name:	acrv_UpfrontPayment
Namespace Prefix:	acrv_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-3

+ Details

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

- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

+ Details

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

- Definition

The cash inflow associated with the amount received from entity's raising of capital via private rather than public placement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 14
-Subparagraph (a)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-14

+ Details

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

- Definition

The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

+ References

No definition available.

+ Details

Name:	us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

+ References

No definition available.

+ Details

Name:	us-gaap_SaleOfStockPricePerShare
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481674/830-30-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483399/855-10-50-2

+ Details

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

- Details

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Namespace Prefix:
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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_CommonStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
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- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
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- Details

Name:	us-gaap_TypeOfArrangementAxis=acrv_PipeSecuritiesPurchaseAgreementMember
Namespace Prefix:
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Subsequent Events - Additional Information (Details) $ / shares in Units, $ in Millions			1 Months Ended		3 Months Ended
	Apr. 11, 2024 USD ($)	Apr. 08, 2024 $ / shares shares	Apr. 30, 2024 USD ($) Milestone	Jun. 30, 2022 USD ($)	Mar. 31, 2024 Milestone
Akoya Agreement
Subsequent Event [Line Items]
Upfront payment \| $				$ 0.6
Number of milestones achieved \| Milestone					0
Subsequent Event
Subsequent Event [Line Items]
Gross Proceeds from the Private Investment in Public Equity \| $	$ 130.0
Subsequent Event \| Pre-Funded Warrants
Subsequent Event [Line Items]
Pre-Funded Warrant Notice Period		61 days
Subsequent Event \| Pre-Funded Warrants \| Common Stock \| Maximum
Subsequent Event [Line Items]
Shares outstanding percentage		19.99%
Subsequent Event \| Pre-Funded Warrants \| Common Stock \| Minimum
Subsequent Event [Line Items]
Shares outstanding percentage		4.99%
Subsequent Event \| Akoya Agreement
Subsequent Event [Line Items]
Number of milestones achieved \| Milestone			3
Incurred additional development milestones \| $			$ 1.8
Subsequent Event \| PIPE Securities Purchase Agreement
Subsequent Event [Line Items]
Common Stock Shares Issued \| shares		8,235,000
Common stock price per share \| $ / shares		$ 8.5
Subsequent Event \| PIPE Securities Purchase Agreement \| Pre-Funded Warrants
Subsequent Event [Line Items]
Purchase price per Warrant \| $ / shares		8.499
Exercise Price per Share \| $ / shares		$ 0.001
Subsequent Event \| PIPE Securities Purchase Agreement \| Pre-Funded Warrants \| Maximum
Subsequent Event [Line Items]
Shares of common stock issuable upon exercise of warrants \| shares		7,060,000