Quarterly report pursuant to Section 13 or 15(d)

Organization and Description of Business - Additional Information (Detail)

v3.22.1
Organization and Description of Business - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 22, 2021
Mar. 10, 2021
Aug. 14, 2020
May 27, 2020
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Organization And Description Of Business [Line Items]              
Accumulated deficit         $ 280,709   $ 260,552
Net cash used in operating activities         11,767 $ 9,059  
Number of shares issued       11,797,752      
Cash Cash Equivalents And Marketable Securities         $ 42,300    
BARDA Contract [Member]              
Organization And Description Of Business [Line Items]              
Total funding receives in future   $ 86,800          
Contract period of performance   6 years          
BARDA Contract [Member] | Additional BARDA Funding [Member]              
Organization And Description Of Business [Line Items]              
Total funding receives in future   $ 77,000          
BARDA Contract [Member] | Base Period BARDA Funding [Member]              
Organization And Description Of Business [Line Items]              
Total funding receives in future   $ 9,800          
Follow-on Offering [Member]              
Organization And Description Of Business [Line Items]              
Public offering price, per unit       $ 4.45      
Stock issued during period, value     $ 150,000        
Over-Allotment Option [Member]              
Organization And Description Of Business [Line Items]              
Number of shares issued 11,500,000            
Public offering price, per unit $ 5.00            
Proceeds from initial public offer $ 53,800