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Assets and Liabilities Held For Sale - Schedule of Assets Held For Sale (Details) - Disposal Group, Held-for-Sale, Not Discontinued Operations - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Current assets:
Current assets held for sale	$ 29,173	$ 0
Non-current assets held for sale	4,058	0
Current liabilities:
Current liabilities held for sale	26,423	0
Non-current liabilities held for sale	436	$ 0
BioCryst Ireland
Current assets:
Cash and cash equivalents	14,840
Trade receivables	10,285
Inventory, net	2,146
Prepaid expenses and other current assets	1,902
Current assets held for sale	29,173
Non-current assets held for sale	4,058
Total assets held for sale	33,231
Current liabilities:
Accounts payable	1,714
Accrued expenses	24,371
Other current liabilities	338
Current liabilities held for sale	26,423
Non-current liabilities held for sale	436
Total liabilities held for sale	$ 26,859

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