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License and Collaboration Agreements (Details) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2022	Jan. 31, 2019	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2023	Dec. 31, 2022
License and Collaboration Agreements [Line Items]
Agreement initial term		5 years
Milestone payments					$ 11,100
Original celltrion agreement					87.50%
Amended celltrion agreement					250.00%
Revenue recognized
Research and Development Expense [Member]
License and Collaboration Agreements [Line Items]
Milestone payments					70,000
Royalties amount			$ 6	$ 6	19	$ 19
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
Celltrion Collaboration and License Agreement [Member]
License and Collaboration Agreements [Line Items]
Milestone payments					1,750,000
Original celltrion agreement					$ 10,000
Percentage of reimbursement					50.00%
Celltrion Collaboration and License Agreement [Member] | Research and Development Expense [Member]
License and Collaboration Agreements [Line Items]
Original celltrion agreement					$ 6,000
ABI [Member]
License and Collaboration Agreements [Line Items]
Milestone payments					485,000
Minimum [Member]
License and Collaboration Agreements [Line Items]
Royalties amount					$ 20
Amended celltrion agreement					25.00%
Maximum [Member]
License and Collaboration Agreements [Line Items]
Royalties amount					$ 30
Amended celltrion agreement					50.00%
First Milestone [Member]
License and Collaboration Agreements [Line Items]
Milestone payments	$ 2,000						$ 2,000	$ 2,000
First Milestone [Member] | Celltrion Collaboration and License Agreement [Member]
License and Collaboration Agreements [Line Items]
Milestone payments

X

- Definition

Agreement initial term.

+ References

No definition available.

+ Details

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

X

- Definition

Represent the milestone payment.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The amount of non-refundable payments.

+ References

No definition available.

+ Details

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

X

- Definition

Original celltrion agreement.

+ References

No definition available.

+ Details

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

X

- Definition

Percentage of amended celltrion agreement.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of original celltrion agreement.

+ References

No definition available.

+ Details

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Data Type:	dtr:percentItemType
Balance Type:	na
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X

- Definition

Percentage of reimbursement.

+ References

No definition available.

+ Details

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Balance Type:	na
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X

- 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

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- 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

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Balance Type:	credit
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X

- Definition

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

+ References

No definition available.

+ Details

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- Details

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- Details

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X

- Details

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X

- Details

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- Details

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- Details

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- Details

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- Details

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