Development and License Agreements - Additional Information (Detail) - USD ($)	1 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020
BARDA Agreement
Licenses Agreements [Line Items]
Additional committed fund receivable			$ 9,600,000
Committed fund receivable		$ 126,500,000
Committed fund receivable		223,500,000
Accounts receivable of billed and unbilled amounts		4,700,000		$ 4,600,000
BARDA Agreement | Cerus Corporation
Licenses Agreements [Line Items]
Co-investment by the company		9,600,000
FDA Agreement
Licenses Agreements [Line Items]
Accounts receivable of billed and unbilled amounts		$ 200,000
Contract agreement term	5 years
Total potential contract value	$ 11,100,000
FDA Agreement | Maximum
Licenses Agreements [Line Items]
Accounts receivable of billed and unbilled amounts				$ 100,000