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Summary of Significant Accounting Policies - Additional Information (Detail) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 USD ($) Segment | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Jan. 01, 2019 USD ($)
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] |  |  |  |
Number of operating segment | Segment | 1 |  |  |
Cash, cash equivalents and marketable securities | $ 145,500,000 |  |  |
Impairment of Intangible assets | 0 | $ 0 | $ 0 |
Impairments of tangible assets | 0 | 0 | 0 |
Goodwill impairments | $ 0 | $ 0 | $ 0 |
Federal corporate income tax rate | 21.00% |  |  |
Cost of Sales - Product |  |  |  |
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] |  |  |  |
Inventory reserves | $ 1,000,000 |  |  |
Credit Concentration Risk |  |  |  |
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] |  |  |  |
Concentration risk, customer | three largest customers |  |  |
Trade Receivable | Credit Concentration Risk |  |  |  |
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] |  |  |  |
Concentration risk, percentage | 71.00% |  |  |
Product | Revenue | Credit Concentration Risk |  |  |  |
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] |  |  |  |
Concentration risk, percentage | 68.00% |  |  |
United States |  |  |  |
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] |  |  |  |
Percentage of revenue earned | 83.00% | 90.00% | 92.00% |
Percentage of long lived assets | 24.00% | 15.00% |  |
Maximum |  |  |  |
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] |  |  |  |
Cash equivalents original maturity period | 3 months |  |  |
Expected period of payment to be received | 1 year |  |  |
Maximum | Subsequent Event |  |  |  |
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] |  |  |  |
Right-of-use asset for operating leases |  |  |  | $ 40,000,000
Lease Liabilities for operating leases |  |  |  | 40,000,000
Minimum | Subsequent Event |  |  |  |
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] |  |  |  |
Right-of-use asset for operating leases |  |  |  | 34,000,000
Lease Liabilities for operating leases |  |  |  | $ 34,000,000
Dynavax GmbH |  |  |  |
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] |  |  |  |
Currency translation adjustments | $ (1,100,000) | $ 2,800,000 | $ (700,000) |
Currency transaction gain (loss) | $ 300,000 | $ (600,000) | $ 200,000 |

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