Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Additional Information (Detail)

v3.23.3
Summary of Significant Accounting Policies - Additional Information (Detail)
 3 Months Ended 9 Months Ended
Mar. 10, 2021
USD ($)
Sep. 30, 2023
USD ($)
Securities
Sep. 30, 2022
USD ($)
Sep. 30, 2023
USD ($)
Securities
Sep. 30, 2022
USD ($)
Dec. 31, 2022
USD ($)
Securities
Summary Of Significant Accounting Policies [Line Items]            
Maturity period of highly liquid investments       three months or less    
Realized gains or losses on marketable securities       $ 0 $ 0  
Marketable securities   $ 0   $ 0    
Number of securities in unrealized loss position for more than 12 months | Securities   0   0   0
Grants receivable recognized     $ 900,000 $ 3,200,000 $ 5,200,000  
Grants receivable           $ 2,600,000
Grants remaining to be awarded   $ 2,000,000   2,000,000    
BARDA Contract [Member] | Base Period BARDA Funding [Member]            
Summary Of Significant Accounting Policies [Line Items]            
Total funding receives in future $ 9,800,000          
Barda Extended Contract [Member] | Base Period BARDA Funding [Member]            
Summary Of Significant Accounting Policies [Line Items]            
Total funding receives in future       6,600,000    
Maximum [Member]            
Summary Of Significant Accounting Policies [Line Items]            
Grants receivable recognized   100,000        
Grants receivable   100,000   100,000    
Level 1 [Member]            
Summary Of Significant Accounting Policies [Line Items]            
Liabilities   0   0    
Level 2 [Member]            
Summary Of Significant Accounting Policies [Line Items]            
Liabilities   $ 0   $ 0