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Collaborative and Other Relationships (Details) $ in Thousands					1 Months Ended		3 Months Ended		6 Months Ended
	Sep. 15, 2021 USD ($)	Nov. 05, 2019 USD ($)	Sep. 06, 2018 USD ($) dose	Sep. 30, 2013 USD ($)	Aug. 31, 2020 USD ($)	Jun. 30, 2000 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) dose	Jun. 30, 2021 USD ($)	Jun. 30, 2015 USD ($)	Sep. 30, 2000 USD ($)
Collaborative and Other Relationships [Line Items]
Total revenues							$ 65,532	$ 49,959	$ 115,455	$ 69,018
U.S. Department of Health and Human Services
Collaborative and Other Relationships [Line Items]
Collaborative agreement contract value			$ 34,660
Contract term (in years)			5 years
U.S. Department of Health and Human Services | RAPIVAB
Collaborative and Other Relationships [Line Items]
Maximum number of products, doses | dose			50,000						50,000
Number of doses delivered, doses | dose									29,980
Proceeds from collaborators									$ 20,782
Torii Pharmaceutical Co. [Member]
Collaborative and Other Relationships [Line Items]
Total revenues		$ 22,000
Potential milestone payments receivable if regulatory approval before specified date		$ 15,000
Maximum customary reduction on royalty rate		50.00%
Royalty payments receivable, expiration term from first commercial (in years)		10 years
Torii Pharmaceutical Co. [Member] | Minimum
Collaborative and Other Relationships [Line Items]
Royalty rate if maintains sakigake designation		20.00%
Torii Pharmaceutical Co. [Member] | Maximum
Collaborative and Other Relationships [Line Items]
Royalty rate if maintains sakigake designation		40.00%
Base Contract
Collaborative and Other Relationships [Line Items]
Government contract receivable											$ 16,265
Additional Development Options
Collaborative and Other Relationships [Line Items]
Government contract receivable											22,855
ASPRBARDA Contract
Collaborative and Other Relationships [Line Items]
Government contract receivable											$ 39,120
Proceeds from awards for research and development contracts									$ 20,574
AECOM and IRL
Collaborative and Other Relationships [Line Items]
Milestone payment minimum						$ 1,400
Milestone payment maximum						$ 4,000
Annual license fee minimum												$ 150
Annual license fee maximum												$ 500
National Institute of Allergy and Infectious Diseases
Collaborative and Other Relationships [Line Items]
Expected receivable from awards for research and development contracts	$ 47,315			$ 45,931
Potential aggregate maximum amount of funding					$ 43,908
Collaborative agreement contract value					$ 6,326
UAB
Collaborative and Other Relationships [Line Items]
Period of agreement (in years)									25 years
Renewable period of agreement (in years)									5 years

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