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Development and License Agreements - Additional Information (Detail) - USD ($)
 1 Months Ended 3 Months Ended
Sep. 30, 2020
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Apr. 30, 2020
Licenses Agreements [Line Items]          
Payments made relating to the manufacturing of the products   $ 11,800,000 $ 8,100,000    
BARDA Agreement          
Licenses Agreements [Line Items]          
Additional committed fund receivable         $ 13,800,000
Committed fund receivable   116,900,000      
Committed fund receivable   213,900,000      
Accounts receivable of billed and unbilled amounts   5,200,000   $ 4,600,000  
BARDA Agreement | Cerus Corporation          
Licenses Agreements [Line Items]          
Co-investment by the company   5,000,000.0      
Additional co-investment by the company   9,600,000      
Co-investment incurred by the company   2,500,000      
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