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Revenue Recognition - Schedule of Revenues from Major Customers (Detail) - HEPLISAV-B - Product Concentration Risk [Member] - Revenue Benchmark [Member]
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Largest Customer    
Concentration Risk [Line Items]    
Percentage of product revenue 27.00% 27.00%
Second Largest Customer    
Concentration Risk [Line Items]    
Percentage of product revenue 19.00% 22.00%
Third Largest Customer    
Concentration Risk [Line Items]    
Percentage of product revenue 18.00% 17.00%