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Commercial Manufacturing and Supply Agreement - Additional Information (Details) - 6 months ended Jun. 30, 2024 SFr in Millions, $ in Millions | CHF (SFr) renewalOption | USD ($)
--- | --- | ---
Supply Commitment [Line Items] |  |
Additional renewal period | renewalOption | 3 |
Automatic renewal period, advanced notice period | 24 months |
Repurposing fee, credit duration | 10 years |
Minimum |  |
Supply Commitment [Line Items] |  |
Termination of agreement, wind-down and transition services period | 12 months |
Maximum |  |
Supply Commitment [Line Items] |  |
Termination of agreement, wind-down and transition services period | 24 months |
Lonza Commercial Manufacturing and Supply Agreement |  |
Supply Commitment [Line Items] |  |
Automatic renewal period | 5 years |
Agreement termination penalty |  | $ 70.0
Repurposing fee | SFr | SFr 27.0 |
Capital expenditure related to the facility build out and equipment |  | 89.4
Facility build out expenditures |  | $ 50.6

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- Definition Agreement termination penalty. + References No definition available. + Details
Name: | pcvx_AgreementTerminationPenalty
Namespace Prefix: | pcvx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Automatic renewal period. + References No definition available. + Details
Name: | pcvx_AutomaticRenewalPeriod
Namespace Prefix: | pcvx_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Automatic Renewal Period, Advanced Notice Period + References No definition available. + Details
Name: | pcvx_AutomaticRenewalPeriodAdvancedNoticePeriod
Namespace Prefix: | pcvx_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Capital Expenditure Related To The Facility Build Out And Equipment + References No definition available. + Details
Name: | pcvx_CapitalExpenditureRelatedToTheFacilityBuildOutAndEquipment
Namespace Prefix: | pcvx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Facility Build Out Expenditures + References No definition available. + Details
Name: | pcvx_FacilityBuildOutExpenditures
Namespace Prefix: | pcvx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Number of additional renewal periods. + References No definition available. + Details
Name: | pcvx_NumberOfAdditionalRenewalPeriods
Namespace Prefix: | pcvx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Repurposing fee + References No definition available. + Details
Name: | pcvx_RepurposingFee
Namespace Prefix: | pcvx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Repurposing Fee, Credit Duration + References No definition available. + Details
Name: | pcvx_RepurposingFeeCreditDuration
Namespace Prefix: | pcvx_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Termination Of Agreement, Wind-Down And Transition Services Period + References No definition available. + Details
Name: | pcvx_TerminationOfAgreementWindDownAndTransitionServicesPeriod
Namespace Prefix: | pcvx_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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

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- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_SupplyCommitmentAxis=pcvx_LonzaCommercialManufacturingAndSupplyAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |