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Organization - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2014
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Date of Acquisition	Apr. 30, 2006
Business Acquisition, Description of Acquired Entity	In April 2006, we completed the acquisition of Rhein Biotech GmbH (“Rhein” or “Dynavax Europe”), a wholly-owned subsidiary in Düsseldorf, Germany.

X

- Definition

With respect to a business combination completed during the period, this element provides a description of the business, other than the name, which may include the industry, size, products and other important information.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

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- Definition

Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

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-Name Accounting Standards Codification

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