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Collaboration, License, and Supply Agreements (Details) $ in Millions | Jun. 30, 2022 USD ($)
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Takeda Arrangement |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |
Potential future milestone payments | $ 20.0

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- Definition Potential Future Milestone Payments + References No definition available. + Details
Name: | nvax_PotentialFutureMilestonePayments
Namespace Prefix: | nvax_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

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- Details
Name: | us-gaap_TypeOfArrangementAxis=nvax_TakedaArrangementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |