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Revenue Recognition - Schedule of Revenues from Major Customers (Detail) - HEPLISAV-B - Product Concentration Risk - Revenue Benchmark	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Largest customer
Concentration Risk [Line Items]
Percentage of product revenue	33.00%	31.00%	30.00%	29.00%
Second largest customer
Concentration Risk [Line Items]
Percentage of product revenue	21.00%	20.00%	20.00%	21.00%
Third largest customer
Concentration Risk [Line Items]
Percentage of product revenue	21.00%	19.00%	20.00%	18.00%

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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