Quarterly report pursuant to Section 13 or 15(d)

Organization and Description of Business - Additional Information (Detail)

v3.22.2.2
Organization and Description of Business - Additional Information (Detail)
$ / shares in Units, $ in Thousands
 6 Months Ended
Mar. 22, 2021
USD ($)
$ / shares
shares
Mar. 10, 2021
USD ($)
Aug. 14, 2020
USD ($)
May 27, 2020
$ / shares
shares
Jun. 30, 2022
USD ($)
ExtensionOptions
Jun. 30, 2021
USD ($)
Dec. 31, 2021
USD ($)
Organization And Description Of Business [Line Items]              
Accumulated deficit         $ (298,798)   $ (260,552)
Net cash used in operating activities         (26,352) $ (21,504)  
Number of shares issued | shares       11,797,752      
Cash Cash Equivalents And Marketable Securities         $ 27,300    
Restructuring and Related Cost, Number of Positions Eliminated | ExtensionOptions         16    
Restructuring and Related Cost, Number of Positions Eliminated, Period Percent         37.00%    
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 | $ / shares       $ 4.45      
Stock issued during period, value     $ 150,000        
Over-Allotment Option [Member]              
Organization And Description Of Business [Line Items]              
Number of shares issued | shares 11,500,000            
Public offering price, per unit | $ / shares $ 5            
Proceeds from initial public offer $ 53,800