XML 45 R34.htm IDEA: XBRL DOCUMENT v3.23.3

Significant Accounting Policies and Concentrations of Risk - Net Loss Per Share (Details) - shares	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Significant Accounting Policies and Concentration of Risk [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	54,772,000	50,430,000
Outstanding stock options
Significant Accounting Policies and Concentration of Risk [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	35,160,000	32,647,000
Restricted Stock Units (RSUs)
Significant Accounting Policies and Concentration of Risk [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	4,589,000	2,760,000
Warrants to purchase common stock
Significant Accounting Policies and Concentration of Risk [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	15,023,000	15,023,000

X

- Definition

Significant Accounting Policies and Concentrations of Risk

+ References

No definition available.

+ Details

Name:	bcrx_SignificantAccountingPoliciesAndConcentrationsOfRiskLineItems
Namespace Prefix:	bcrx_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482662/260-10-50-1

+ Details

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=us-gaap_EmployeeStockOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=us-gaap_RestrictedStockUnitsRSUMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=us-gaap_WarrantMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: