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Subsequent Events	9 Months Ended
Subsequent Events	Sep. 30, 2016
Subsequent Events [Abstract]
Subsequent Events	9. Subsequent Events On October 26, 2016, Dynavax entered into a Note Purchase Agreement (the “Note Purchase Agreement”) with one or more funds of Deerfield Management Company, L.P. (collectively, the “Purchasers”) and one such fund, as collateral agent, pursuant to which the Company agreed to sell, and the Purchasers agreed to purchase, an aggregate of $100.0 million principal amount of the Company’s senior secured notes (the “Notes”) for an aggregate purchase price of $100.0 million. The closing of the sale and purchase of the Notes is expected to occur after the Company receives U.S. Food and Drug Administration (“FDA”) approval for the sale and marketing of HEPLISAV-B and certain other closing conditions are satisfied (the date of such closing, the “Purchase Date”). The Company expects to use the proceeds of the Notes for general corporate purposes, including the commercialization of HEPLISAV-B. The outstanding principal amount of the Notes will accrue interest at a rate equal to 10.375% per annum. The Notes will mature on the fifth anniversary of the Purchase Date, unless earlier prepaid or repurchased. The Company’s obligations under the Notes and the Note Purchase Agreement will be required to be guaranteed by certain of the Company’s future subsidiaries and will be secured by a perfected security interest in substantially all of the assets of the Company and any future subsidiary guarantors, subject to customary permitted liens and other agreed upon exceptions.