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Note 4 - Trade Receivables (Tables)

3 Months Ended

Mar. 31, 2022

Notes Tables

Schedule of Receivables from Collaborations [Table Text Block]

		March 31, 2022
		Billed				Unbilled				Total
U.S. Department of Health and Human Services		$	5			$	1,600			$	1,605
Royalty receivables from partners			327				—				327
Total receivables		$	332			$	1,600			$	1,932

		December 31, 2021
		Billed				Unbilled				Total
U.S. Department of Health and Human Services		$	5			$	1,670			$	1,675
Royalty receivables from partners			305				—				305
Total receivables		$	310			$	1,670			$	1,980

X

- Definition

Tabular disclosure representing receivables from collaborations.

+ References

No definition available.

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Namespace Prefix:	bcrx_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

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