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v3.25.2

Commitments and Contingencies - Additional Information (Details) - USD ($) | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Commitments And Contingencies [Line Items] |  |
Accrued termination charges | $ 0 | $ 0
Aggregate minimum commitment | 76,800,000 |
Performance-Based Milestone Awards |  |
Commitments And Contingencies [Line Items] |  |
Accrual for milestones not probable | $ 0 |

X
- Definition Accrual for milestones not probable. + References No definition available. + Details
Name: | bbio_AccrualForMilestonesNotProbable
Namespace Prefix: | bbio_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Accrued termination charges. + References No definition available. + Details
Name: | bbio_AccruedTerminationCharges
Namespace Prefix: | bbio_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Aggregate minimum commitment. + References No definition available. + Details
Name: | bbio_AggregateMinimumCommitment
Namespace Prefix: | bbio_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Commitments and Contingencies. + References No definition available. + Details
Name: | bbio_CommitmentsAndContingenciesLineItems
Namespace Prefix: | bbio_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AwardTypeAxis=bbio_PerformanceBasedMilestoneAwardsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |