v3.25.3

Assets and Liabilities Held For Sale (Details) - Disposal Group, Held-for-Sale, Not Discontinued Operations - BioCryst Ireland - Forecast $ in Thousands	Oct. 01, 2025 USD ($)
Property, Plant and Equipment [Line Items]
Upfront consideration to be received	$ 250,000
Contingent consideration to be received	14,000
Royalty release fee	$ 15,000

Disposal Group, Including Discontinued Operation, Consideration, Royalty Release Fee

+ References

No definition available.

+ Details

Name:	bcrx_DisposalGroupIncludingDiscontinuedOperationConsiderationRoyaltyReleaseFee
Namespace Prefix:	bcrx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Disposal Group, Including Discontinued Operation, Contingent Consideration

+ References

No definition available.

+ Details

Name:	bcrx_DisposalGroupIncludingDiscontinuedOperationContingentConsideration
Namespace Prefix:	bcrx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

+ References

No definition available.

+ Details

Name:	us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 7A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-7A

+ Details

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

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=bcrx_BioCrystIrelandMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

BIOCRYST PHARMACEUTICALS INC 10-Q