The aggregate purchase price of the additional shares and additional warrants under an agreement.

No definition available.

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Namespace Prefix:	oabi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Definition

Number of additional common stock to be purchased.

+ References

No definition available.

+ Details

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- Definition

Number of additional 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

No definition available.

+ Details

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Namespace Prefix:	oabi_
Data Type:	xbrli:sharesItemType
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Period Type:	instant

- Definition

Amount of deemed dividends related to the Forward Purchase and Backstop Securities.

+ References

No definition available.

+ Details

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

- Definition

The maximum aggregate purchase price of the additional shares and additional warrants under an agreement in order to backstop shareholder redemptions for cash proceeds to be limited to the maximum.

+ References

No definition available.

+ Details

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Namespace Prefix:	oabi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the Shares back shop warrants .

+ References

No definition available.

+ Details

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Namespace Prefix:	oabi_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Shares to be purchased pursuant to agreements.

+ References

No definition available.

+ Details

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Namespace Prefix:	oabi_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the Sponsor purchased backstop.

+ References

No definition available.

+ Details

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Namespace Prefix:	oabi_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of new units issued during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	oabi_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Warrants to be purchased pursuant to agreements.

+ References

No definition available.

+ Details

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Namespace Prefix:	oabi_
Data Type:	xbrli:sharesItemType
Balance Type:	na
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- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Includes, but is not limited to, one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and termination benefits associated with an ongoing benefit arrangement. Excludes expenses associated with special or contractual termination benefits, a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21475-112644

+ 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

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

- Definition

The cash inflow from issuance of rights to purchase common shares at predetermined price (usually issued together with corporate debt).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3255-108585

+ Details

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

- Definition

The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity.

+ References

+ Details

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

- Details

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- Details

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- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=oabi_SponsorMember
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- Details

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Data Type:	na
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- Details

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Data Type:	na
Balance Type:
Period Type:

- Details

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Data Type:	na
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- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix:
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COMMITMENTS AND CONTINGENCIES - Forward Purchase Agreement (Details) - Avista Public Acquisition Corp. II [Member] - USD ($)			3 Months Ended			8 Months Ended	9 Months Ended	11 Months Ended
	Mar. 23, 2022	Aug. 12, 2021	Sep. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Sep. 30, 2021	Sep. 30, 2022	Dec. 31, 2021
Aggregate warrants to be purchase pursuant to agreements								3,333,333
Exercise price of warrants								$ 11.5
Aggregate purchase price private placement		$ 230,000,000
Maximum additional aggregate purchase price			$ 100,000,000
Deemed dividend upon modification of the forward purchase agreement			$ 0	$ (225,000)	$ 0	$ 0	$ (225,000)
Aggregate purchase price		$ 12,350,000
Amended and Restated Forward Purchase Agreement
Number of warrants issued	1,666,667
Amended and Restated Forward Purchase Agreement \| Sponsor
Aggregate purchase price private placement	$ 15,000,000
Number of warrants issued	1,500,000
Additional aggregate purchase price	$ 86,729,340						$ 100,000,000
Maximum additional aggregate purchase price	100,000,000
Termination fee	12,500,000
Deemed dividend upon modification of the forward purchase agreement	$ 225,000
Sponsor purchased backstop	8,672,934
Shares backstop warrants	1,445,489
Forward Purchase Agreement \| Sponsor
Exercise price of warrants			$ 11.5				$ 11.5
Warrant [Member]
Aggregate purchase price private placement								$ 100,000,000
Warrant [Member] \| Amended and Restated Forward Purchase Agreement \| Sponsor
Number of warrants issued	1,666,667		1,666,667				1,666,667
Additional number of warrants	1,666,667
Warrant [Member] \| Forward Purchase Agreement \| Sponsor
Aggregate purchase price private placement							$ 100,000,000
Private Placement Warrants \| Amended and Restated Forward Purchase Agreement
Aggregate purchase price	$ 15,000,000
Common Class A [Member]
Shares To Be Purchased Pursuant To Agreements								10,000,000
Common Class A [Member] \| Forward Purchase Agreement
Aggregate warrants to be purchase pursuant to agreements							3,333,333
Common Class A [Member] \| Forward Purchase Agreement \| Sponsor
Shares To Be Purchased Pursuant To Agreements							10,000,000
APAC Common stock \| Amended and Restated Forward Purchase Agreement \| Sponsor
Number of units issued	1,500,000
Additional number of common stock	10,000,000