Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Total revenues	$ 65,532	$ 49,959	$ 115,455	$ 69,018
Product sales, net
Disaggregation of Revenue [Line Items]
Total revenues	64,888	33,430	114,434	51,301
Product sales, net | ORLADEYO
Disaggregation of Revenue [Line Items]
Total revenues	64,711	28,374	114,097	39,312
Product sales, net | RAPIVAB
Disaggregation of Revenue [Line Items]
Total revenues	177	4,622	337	4,735
Product sales, net | Peramivir
Disaggregation of Revenue [Line Items]
Total revenues	0	434	0	7,254
Royalty revenue
Disaggregation of Revenue [Line Items]
Total revenues	540	128	887	(769)
Milestone revenue
Disaggregation of Revenue [Line Items]
Total revenues	0	15,000	0	15,000
Collaborative and other research and development
Disaggregation of Revenue [Line Items]
Total revenues	104	1,401	134	3,486
Collaborative and other research and development | U.S. Department of Health and Human Services
Disaggregation of Revenue [Line Items]
Total revenues	$ 104	$ 1,401	$ 134	$ 3,486