Percentage of debt instrument cash coverage.

No definition available.

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Balance Type:	na
Period Type:	instant

- Definition

Amount of maximum proceeds that can be withdrawn on achievement of milestone eliminated.

+ References

No definition available.

+ Details

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

- Definition

Represents the multiplier factor used to calculate common stock.

+ References

No definition available.

+ Details

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Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

Increase in face (par) amount of debt instrument at time of issuance.

+ References

No definition available.

+ Details

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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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Balance Type:	na
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 55
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482949/835-30-55-8

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B

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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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
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-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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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

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

- Details

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Data Type:	na
Balance Type:
Period Type:

- Details

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- Details

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Subsequent Events - Amendments to Hercules Loan and Security Agreement and Warrant Agreements (Details) $ / shares in Units, $ in Millions	Jul. 31, 2025 USD ($) $ / shares	Jul. 30, 2025 USD ($)	Jun. 30, 2025 $ / shares	Nov. 06, 2024 USD ($) $ / shares
Hercules Warrants
Subsequent Events
Price per share (in dollars per share) \| $ / shares			$ 5.74
2024 Loan and Security Agreement
Subsequent Events
Term loan				$ 50.0
2024 Loan and Security Agreement \| Hercules Warrants
Subsequent Events
Price per share (in dollars per share) \| $ / shares				$ 5.74
Multiplier factor used to calculate common stock				0.02
Tranche four loan and security agreement
Subsequent Events
Term loan				$ 20.0
Tranche two and three loan and security agreement
Subsequent Events
Term loan				$ 15.0
Subsequent Events \| 2024 Loan and Security Agreement \| Minimum
Subsequent Events
Cash coverage percentage	60.00%
Subsequent Events \| 2024 Loan and Security Agreement \| Maximum
Subsequent Events
Cash coverage percentage	100.00%
Subsequent Events \| 2024 Loan and Security Agreement \| Hercules Warrants
Subsequent Events
Price per share (in dollars per share) \| $ / shares	$ 3.58
Multiplier factor used to calculate common stock	0.04
Subsequent Events \| Tranche four loan and security agreement
Subsequent Events
Increase in term loan	$ 15.0
Term loan	35.0	$ 20.0
Subsequent Events \| Tranche two and three loan and security agreement
Subsequent Events
Amount of withdrawal of debt eliminated	$ 15.0