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Revenue Recognition - Summary of Product Revenue Allowance and Reserve Categories (Detail) - HEPLISAV-B®
$ in Thousands
 3 Months Ended
Mar. 31, 2020
USD ($)
Accounts Receivable Reserves  
Product Revenue Allowance and Revenue Categories [Line Items]  
Balance at Beginning of Period $ 2,701
Provisions related to current period sales 2,906
Credit or payments made during the period (2,749)
Balance at End of Period 2,858
Revenue Reserve Accruals  
Product Revenue Allowance and Revenue Categories [Line Items]  
Balance at Beginning of Period 3,893
Provisions related to current period sales 2,045
Credit or payments made during the period (1,355)
Balance at Beginning of Period $ 4,583