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Percentage of long lived assets.

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Percentage of revenue earned.

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Cash includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the customer may deposit additional funds at any time and effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid Investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Short-term investments, exclusive of cash equivalents, generally consist of marketable securities intended to be sold within one year (or the normal operating cycle if longer) and may include trading securities, available-for-sale securities, or held-to-maturity securities (if maturing within one year), as applicable.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount before tax of foreign currency transaction realized gain (loss) recognized in the income statement.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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The charge against earnings resulting from the aggregate write down of tangible assets from their carrying value to their fair value.

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Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017 USD ($) Segment vial	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Number of operating segment \| Segment		1
Cash, cash equivalents and marketable securities		$ 191,900,000
Impairment of Intangible assets		0
Impairments of tangible assets		0	$ 0	$ 0
Goodwill impairments		$ 0	$ 0	$ 0
Federal corporate income tax rate		35.00%
New Corporate Tax Rate
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Federal corporate income tax rate	21.00%
HEPLISAV-B™
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Number of vials \| vial		250,000
Expected minimum selling period		9 months
United States
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Percentage of revenue earned		90.00%	92.00%	85.00%
Percentage of long lived assets		15.00%	17.00%
Maximum
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Cash equivalents original maturity period		3 months
Dynavax GmbH
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Currency translation adjustments		$ 2,800,000	$ (700,000)	$ (1,300,000)
Currency transaction (loss) gain		$ (600,000)	$ 200,000	$ 100,000