Agreement initial term.

No definition available.

Name:	abp_AgreementInitialTerm
Namespace Prefix:	abp_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represent the milestone payment.

+ References

No definition available.

+ Details

Name:	abp_MilestonePayments
Namespace Prefix:	abp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of non-refundable payments.

+ References

No definition available.

+ Details

Name:	abp_NonRefundablePayments
Namespace Prefix:	abp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Original celltrion agreement.

+ References

No definition available.

+ Details

Name:	abp_OriginalCelltrionAgreement
Namespace Prefix:	abp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Percentage of amended celltrion agreement.

+ References

No definition available.

+ Details

Name:	abp_PercentageOfAmendedCelltrionAgreement
Namespace Prefix:	abp_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of original celltrion agreement.

+ References

No definition available.

+ Details

Name:	abp_PercentageOfOriginalCelltrionAgreement
Namespace Prefix:	abp_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of reimbursement.

+ References

No definition available.

+ Details

Name:	abp_PercentageOfReimbursement
Namespace Prefix:	abp_
Data Type:	dtr: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

The amount of cash paid for royalties during the current period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 25
-Subparagraph (g)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-25

+ Details

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

- Definition

The amount of consideration recognized during the period for the milestone or milestones.

+ References

No definition available.

+ Details

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

- Details

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

- Details

Name:	us-gaap_TypeOfArrangementAxis=abp_ABP201CollaborationAndLicenseAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

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

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=abp_ABIMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=abp_FirstMilestoneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

License and Collaboration Agreements (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended	12 Months Ended
	Jan. 31, 2019	Dec. 31, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2022
License and Collaboration Agreements [Line Items]
Agreement initial term	5 years
Original celltrion agreement			87.50%
Revenue recognized
Accounts receivable		$ 183	183	$ 183
NJCTTQ Collaboration Agreement [Member]
License and Collaboration Agreements [Line Items]
Milestone payments			405,000
Aggregate nonrefundable amounts			5,000
Royalties amount			5,000
ABP-201 Collaboration and License Agreement [Member]
License and Collaboration Agreements [Line Items]
Milestone payments			56,500
Original Celltrion Agreement [Member]
License and Collaboration Agreements [Line Items]
Committed to pay			10,000
Amended Celltrion Agreement [Member]
License and Collaboration Agreements [Line Items]
Committed to pay			$ 6,000
Direct and indirect costs and expenses			250.00%
Celltrion Collaboration and License Agreement [Member]
License and Collaboration Agreements [Line Items]
Milestone payments			$ 1,750,000
Percentage of reimbursement			50.00%
ABI [Member]
License and Collaboration Agreements [Line Items]
Milestone payments			$ 485,000
Minimum [Member]
License and Collaboration Agreements [Line Items]
Royalties amount		20
Minimum [Member] \| Amended Celltrion Agreement [Member]
License and Collaboration Agreements [Line Items]
Direct and indirect costs and expenses			25.00%
Maximum [Member]
License and Collaboration Agreements [Line Items]
Royalties amount		$ 30
Maximum [Member] \| Amended Celltrion Agreement [Member]
License and Collaboration Agreements [Line Items]
Direct and indirect costs and expenses			50.00%
First Milestone [Member]
License and Collaboration Agreements [Line Items]
Milestone payments					$ 2,000
First Milestone [Member] \| Celltrion Collaboration and License Agreement [Member]
License and Collaboration Agreements [Line Items]
Milestone payments