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Reverse Recapitalization and Pre-Closing Financing - Narrative (Details) $ in Thousands	Jun. 13, 2025 USD ($)
Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract]
Goodwill and intangible assets recognized	$ 0

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- Definition

Reverse Recapitalization, Goodwill And Intangible Assets

+ References

No definition available.

+ Details

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Namespace Prefix:	cbio_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration