XML 52 R40.htm IDEA: XBRL DOCUMENT
v3.22.2

Fair Value Measurements - Additional Information (Details) - USD ($) | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021 | Mar. 31, 2021 | Jan. 28, 2021 | Mar. 09, 2020
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |
Fair value assets, transfers between Level 1, Level 2 or Level 3 | $ 0 |  | $ 0 |  | $ 0 |  |  |  |
Fair value liabilities, transfers between Level 1, Level 2 or Level 3 | 0 |  | 0 |  | 0 |  |  |  |
Equity security investment | 27,141,000 |  | 27,141,000 |  | 49,148,000 | [1] |  |  |
Gains and losses from investment in equity securities | (10,362,000) | $ (1,117,000) | (23,228,000) | $ (1,117,000) |  |  |  |  |
Estimated fair value of outstanding term loan | 401,200,000 |  | 401,200,000 |  |  |  |  |  |
LEO call option liability |  |  |  |  |  |  | $ 0 |  |
Gain on remeasurement of LEO call option liability |  |  |  | $ (5,550,000) |  |  |  |  |
Other investment |  |  |  |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |
Equity security investment | 16,300,000 |  | 16,300,000 |  | 18,300,000 |  |  |  |
LianBio |  |  |  |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |
Equity security investment | 10,800,000 |  | 10,800,000 |  | 30,800,000 |  |  |  |
2029 Notes |  |  |  |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument face amount | 747,500,000 |  | 747,500,000 |  |  |  |  | $ 717,500,000 |
Estimated fair value of notes payable | 302,700,000 |  | 302,700,000 |  | 444,800,000 |  |  |  |
2027 Notes |  |  |  |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument face amount | 550,000,000.0 |  | 550,000,000.0 |  |  |  |  |  | $ 550,000,000.0
Estimated fair value of notes payable | $ 247,500,000 |  | $ 247,500,000 |  | $ 407,100,000 |  |  |  |
[1] | The condensed consolidated balance sheet as of December 31, 2021 is derived from the audited consolidated financial statements as of that date.

X
- Definition Call option expense (income). + References No definition available. + Details
Name: | bbio_CallOptionExpenseIncome
Namespace Prefix: | bbio_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Estimated fair value of outstanding term loan. + References No definition available. + Details
Name: | bbio_EstimatedFairValueOfOutstandingTermLoan
Namespace Prefix: | bbio_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Fair value assets transfers between level one level two or level three amount. + References No definition available. + Details
Name: | bbio_FairValueAssetsTransfersBetweenLevelOneLevelTwoOrLevelThreeAmount
Namespace Prefix: | bbio_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Fair value liabilities transfers between level one level two or level three amount. + References No definition available. + Details
Name: | bbio_FairValueLiabilitiesTransfersBetweenLevelOneLevelTwoOrLevelThreeAmount
Namespace Prefix: | bbio_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition LEO call option liability current. + References No definition available. + Details
Name: | bbio_LEOCallOptionLiabilityCurrent
Namespace Prefix: | bbio_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=124435984&loc=d3e28551-108399 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124429444&loc=SL124452920-239629 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69C -URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69B -URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(2)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (f) -URI https://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 1A -URI https://asc.fasb.org/extlink&oid=123594786&loc=SL75136599-209740 + Details
Name: | us-gaap_EquitySecuritiesFvNi
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of unrealized and realized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -SubTopic 10 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=126980263&loc=SL75117546-209714 + Details
Name: | us-gaap_EquitySecuritiesFvNiGainLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value portion of notes payable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20,22) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_NotesPayableFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis=us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=bbio_LianBioMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=bbio_TwoPointTwoFivePercentageConvertibleSeniorNotesDueTwoThousandAndTwentyNineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=bbio_TwoPointFiveZeroPercentageConvertibleSeniorNotesDueTwoThousandAndTwentySevenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |