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

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-8

+ Details

Name:	us-gaap_ContractWithCustomerLiabilityRevenueRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
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:	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:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	srt_ProductOrServiceAxis=abp_FirstMilestoneMember
Namespace Prefix:
Data Type:	na
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License and Collaboration Agreements (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		12 Months Ended
	Jan. 31, 2019	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2022	Apr. 30, 2026	Dec. 31, 2025
License and Collaboration Agreements [Line Items]
Agreement initial term	5 years
Original celltrion agreement		87.50%
Recognized revenue
Accounts receivable		183				$ 183
Subsequent Event [Member]
License and Collaboration Agreements [Line Items]
Accounts receivable					$ 183
ABI [Member]
License and Collaboration Agreements [Line Items]
Milestone payments		485,000
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%
Minimum [Member] \| Amended Celltrion Agreement [Member]
License and Collaboration Agreements [Line Items]
Direct and indirect costs and expenses		25.00%
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