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Revenue Recognition - Schedule of Revenues from Major Customers (Detail) - Product Concentration Risk [Member] - Revenue Benchmark [Member] | 3 Months Ended | 9 Months Ended
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Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Largest Customer | HEPLISAV-B |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Percentage of product revenue | 27.00% | 23.00% | 25.00% | 20.00%
Second Largest Customer | HEPLISAV-B |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Percentage of product revenue | 25.00% | 19.00% | 24.00% | 18.00%
Third Largest Customer | HEPLISAV-B |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Percentage of product revenue | 18.00% | 18.00% | 17.00% | 17.00%
Largest Collaboration Partner | CpG 1018 |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Percentage of product revenue | 0.00% | 69.00% | 0.00% | 46.00%
Second Largest Collaboration Partner | CpG 1018 |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Percentage of product revenue | 0.00% | 22.00% | 0.00% | 33.00%
Third largest collaboration partner | CpG 1018 |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Percentage of product revenue | 0.00% | 9.00% | 0.00% | 15.00%

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