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Leases - Schedule of Future Minimum Lease Payments for Noncancelable Leases (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020 | [1]
--- | --- | --- | ---
Leases [Abstract] |  |
Operating leases, Remainder of 2021 | $ 1,214 |
Operating leases, 2022 | 6,455 |
Operating leases, 2023 | 5,289 |
Operating leases, 2024 | 4,478 |
Operating leases, 2025 | 3,967 |
Operating leases, Thereafter | 6,317 |
Operating leases, Total future minimum lease payments | 27,720 |
Operating leases, Imputed interest | (4,038) |
Operating lease liabilities | 23,682 |
Operating lease liabilities, current portion | 4,999 | $ 3,795
Operating lease liabilities, net of current portion | 18,683 | $ 14,677
Total operating lease liabilities | 23,682 |
Finance lease, Remainder of 2021 | 66 |
Finance lease, 2022 | 420 |
Finance lease, 2023 | 432 |
Finance lease, 2024 | 445 |
Finance lease, 2025 | 459 |
Finance lease, Thereafter | 38 |
Finance lease, Total future minimum lease payments | 1,860 |
Finance lease, Imputed interest | (248) |
Finance lease, Total | 1,612 |
Finance lease liability, current portion — Included in "Other accrued liabilities" | $ 283 |
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List] | bbio:OtherAccruedLiabilitiesCurrent1Member |
Finance lease liability, net of current portion - Included in "Other long-term liabilities" | $ 1,329 |
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] | us-gaap:OtherNoncurrentLiabilitiesMember |
Total finance lease liability | $ 1,612 |
[1] | The condensed consolidated balance sheet as of December 31, 2020 is derived from the audited consolidated financial statements as of that date.

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