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Revenue Recognition - Summary of Disaggregation of Revenues (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Disaggregation Of Revenue [Line Items]    
Total revenues $ 68,164 $ 50,790
U.S.    
Disaggregation Of Revenue [Line Items]    
Total revenues 67,806 49,501
Non U.S.    
Disaggregation Of Revenue [Line Items]    
Total revenues 358 1,289
HEPLISAV-B    
Disaggregation Of Revenue [Line Items]    
Total revenues 64,959 47,845
HEPLISAV-B | U.S.    
Disaggregation Of Revenue [Line Items]    
Total revenues 64,959 46,699
HEPLISAV-B | Non U.S.    
Disaggregation Of Revenue [Line Items]    
Total revenues 0 1,146
Product revenue, net    
Disaggregation Of Revenue [Line Items]    
Total revenues 64,959 47,845
Product revenue, net | U.S.    
Disaggregation Of Revenue [Line Items]    
Total revenues 64,959 46,699
Product revenue, net | Non U.S.    
Disaggregation Of Revenue [Line Items]    
Total revenues 0 1,146
Other revenue    
Disaggregation Of Revenue [Line Items]    
Total revenues 3,205 2,945
Other revenue | U.S.    
Disaggregation Of Revenue [Line Items]    
Total revenues 2,847 2,802
Other revenue | Non U.S.    
Disaggregation Of Revenue [Line Items]    
Total revenues $ 358 $ 143