XML 23 R53.htm IDEA: XBRL DOCUMENT v3.20.1

Note 10 - Collaborative and Other Research and Development Contracts 1 (Details Textual) - USD ($) $ in Thousands						1 Months Ended			3 Months Ended								12 Months Ended				55 Months Ended	57 Months Ended
	Mar. 04, 2020	Nov. 05, 2019	Sep. 06, 2018	Jun. 16, 2015	Feb. 28, 2006	Sep. 30, 2013	Jun. 30, 2006	Jun. 30, 2000	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2019	Mar. 31, 2015	Nov. 11, 2011
Revenue from Contract with Customer, Including Assessed Tax									$ 39,725	$ 1,775	$ 1,448	$ 5,887	$ 2,729	$ 1,454	$ 12,494	$ 3,976		$ 48,835	$ 20,653	$ 25,186
Arbitration Proceedings of SUL Agreement [Member] | Subsequent Event [Member]
Litigation Settlement, Amount Awarded from Other Party	$ 5,000
US Department of Health and Human Services [Member]
Collaborative Agreement Contract Value			$ 34,660
Contract Term			5 years
Proceeds from Collaborators																		13,864
US Department of Health and Human Services [Member] | Forecast [Member]
Proceeds from Collaborators																	$ 6,932
Torii Pharmaceutical Co. [Member]
Upfront Payments Receivable Amount		$ 22,000
Potential Milestone Payments Receivable if Regulatory Approval Before December 31, 2020		20,000
Potential Milestone Payments Receivable if Regulatory Approval Before December 31, 2021		$ 15,000
Maximum Customary Reduction on Royalty Rate		50.00%
Royalty Payments Receivable, Expiration Term From First Commercial		10 years
Revenue from Contract with Customer, Including Assessed Tax																		20,101
Torii Pharmaceutical Co. [Member] | License [Member]
Revenue from Contract with Customer, Including Assessed Tax																		19,344
Torii Pharmaceutical Co. [Member] | Service [Member]
Revenue from Contract with Customer, Including Assessed Tax																		757
Torii Pharmaceutical Co. [Member] | Minimum [Member]
Royalty Rate if Maintains Sakigake Designation		20.00%
Royalty Rate, Otherwise		15.00%
Torii Pharmaceutical Co. [Member] | Maximum [Member]
Royalty Rate if Maintains Sakigake Designation		40.00%
Royalty Rate, Otherwise		35.00%
CSL Limited [Member
Proceeds from License Fees Received				$ 33,740
Milestone Payment Received																					$ 12,000
Royalty Term				10 years
Base Contract [Member]
Government Contract Receivable																							$ 16,265
Additional Development Options [Member]
Government Contract Receivable																							22,855
ASPRBARDA Contract [Member]
Government Contract Receivable																							$ 39,120
Proceeds from awards for Research and Development Contracts																						$ 20,574
Green Cross Corporation [Member]
Proceeds from License Fees Received							$ 250
Mundipharma [Member]
Upfront Payments Receivable Amount					$ 10,000
Potential Milestone Payments Receivable																								$ 15,000
AECOM and IRL [Member]
Milestone Payment Minimum								$ 1,400
Milestone Payment Maximum								4,000
Annual License Fee Minimum								150
Annual License Fee Maximum								$ 500
Advance Notice Period for Termination of Agreement								60 days
National Institute of Allergy and Infectious Diseases [Member]
Collaborative Agreement Contract Value						$ 5,000
Expected Receivable From Awards for Research and Development Contracts																		$ 43,035
UAB [Member]
Period of Agreement																		25 years
Renewable Period of Agreement																		5 years

X

- Definition

Represents advance notice period for termination of agreement.

+ References

No definition available.

+ Details

Name:	bcrx_AdvanceNoticePeriodForTerminationOfAgreement
Namespace Prefix:	bcrx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents annual maximum license fee.

+ References

No definition available.

+ Details

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

X

- Definition

Represent minimum annual license fee.

+ References

No definition available.

+ Details

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

X

- Definition

Represents collaborative agreement contract value.

+ References

No definition available.

+ Details

Name:	bcrx_CollaborativeAgreementContractValue
Namespace Prefix:	bcrx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Period of time between the contract date and its expiration.

+ References

No definition available.

+ Details

Name:	bcrx_ContractTerm
Namespace Prefix:	bcrx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents expected receivable from awards for research and development contracts.

+ References

No definition available.

+ Details

Name:	bcrx_ExpectedReceivableFromAwardsForResearchAndDevelopmentContracts
Namespace Prefix:	bcrx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The maximum percentage of customary reductions allowed on royalty rate.

+ References

No definition available.

+ Details

Name:	bcrx_MaximumCustomaryReductionOnRoyaltyRate
Namespace Prefix:	bcrx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Represents milestone payment maximum.

+ References

No definition available.

+ Details

Name:	bcrx_MilestonePaymentMaximum
Namespace Prefix:	bcrx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Represents milestone payment minimum.

+ References

No definition available.

+ Details

Name:	bcrx_MilestonePaymentMinimum
Namespace Prefix:	bcrx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Represents the amount of milestone payment received.

+ References

No definition available.

+ Details

Name:	bcrx_MilestonePaymentReceived
Namespace Prefix:	bcrx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Represents period of agreement.

+ References

No definition available.

+ Details

Name:	bcrx_PeriodOfAgreement
Namespace Prefix:	bcrx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents potential milestone payments receivable based on possibility of future event payments.

+ References

No definition available.

+ Details

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

X

- Definition

The amount of potential milestone payments if regulatory approval is granted before December 31, 2020.

+ References

No definition available.

+ Details

Name:	bcrx_PotentialMilestonePaymentsReceivableIfRegulatoryApprovalBeforeDecember312020
Namespace Prefix:	bcrx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The amount of potential milestone payments receivable if regulatory approval is granted before December 31, 2021.

+ References

No definition available.

+ Details

Name:	bcrx_PotentialMilestonePaymentsReceivableIfRegulatoryApprovalBeforeDecember312021
Namespace Prefix:	bcrx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Represents proceeds from awards for research and development contracts.

+ References

No definition available.

+ Details

Name:	bcrx_ProceedsFromAwardsForResearchAndDevelopmentContracts
Namespace Prefix:	bcrx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Represents renewable period of agreement.

+ References

No definition available.

+ Details

Name:	bcrx_RenewablePeriodOfAgreement
Namespace Prefix:	bcrx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The expiration term of the royalty payments from first commercial date.

+ References

No definition available.

+ Details

Name:	bcrx_RoyaltyPaymentsReceivableExpirationTermFromFirstCommercial
Namespace Prefix:	bcrx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The percent of net sales that the company will receive if berotralstat maintains its Sakigake designation during the PMDA review.

+ References

No definition available.

+ Details

Name:	bcrx_RoyaltyRateIfMaintainsSakigakeDesignation
Namespace Prefix:	bcrx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The percent of net sales that the company will receive otherwise.

+ References

No definition available.

+ Details

Name:	bcrx_RoyaltyRateOtherwise
Namespace Prefix:	bcrx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Period of time between the date of the Agreement and its expiration.

+ References

No definition available.

+ Details

Name:	bcrx_RoyaltyTerm
Namespace Prefix:	bcrx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents upfront payments receivable.

+ References

No definition available.

+ Details

Name:	bcrx_UpfrontPaymentsReceivableAmount
Namespace Prefix:	bcrx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The amount of receivables that are derived from government contracts.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 912
-SubTopic 310
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=118261985&loc=d3e55295-109406

+ Details

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

X

- Definition

Amount awarded from other party in judgment or settlement of litigation.

+ References

No definition available.

+ Details

Name:	us-gaap_LitigationSettlementAmountAwardedFromOtherParty
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Cash received from collaborators during the current period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3536-108585

+ Details

Name:	us-gaap_ProceedsFromCollaborators
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Cash received from licensees for license fees during the current period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3536-108585

+ Details

Name:	us-gaap_ProceedsFromLicenseFeesReceived
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

+ Details

Name:	us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	srt_LitigationCaseAxis=bcrx_ArbitrationProceedingsOfSulAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_CounterpartyNameAxis=bcrx_USDepartmentOfHealthAndHumanServicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	srt_CounterpartyNameAxis=bcrx_ToriiPharmaceuticalCoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=us-gaap_LicenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=us-gaap_ServiceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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

X

- Details

Name:	srt_CounterpartyNameAxis=bcrx_CSLLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_TypeOfArrangementAxis=bcrx_BaseContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_TypeOfArrangementAxis=bcrx_AdditionalDevelopmentOptionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_TypeOfArrangementAxis=bcrx_ASPRBARDAContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_TypeOfArrangementAxis=bcrx_GreenCrossCorporationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_TypeOfArrangementAxis=bcrx_MundipharmaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_TypeOfArrangementAxis=bcrx_AECOMAndIRLMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis=bcrx_NationalInstituteOfAllergyAndInfectiousDiseasesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis=bcrx_UABMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: