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Collaborative Research and Development Agreements - Additional Information (Detail) (USD $) | 3 Months Ended | 12 Months Ended | 1 Months Ended | 3 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2014 | Mar. 31, 2014 | Dec. 31, 2011 | Oct. 31, 2011 | Dec. 31, 2012 | Mar. 31, 2015 | Aug. 31, 2014 | Sep. 30, 2013 | Jun. 30, 2012 | May 31, 2012 | Aug. 31, 2010
Deferred Revenue Arrangement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue from milestone payment | $ 8,000,000 us-gaap_RevenueRecognitionMilestoneMethodRevenueRecognized | $ 5,400,000 us-gaap_RevenueRecognitionMilestoneMethodRevenueRecognized | $ 3,000,000 us-gaap_RevenueRecognitionMilestoneMethodRevenueRecognized |  |  |  |  |  |  |  |
Astra Zeneca |  |  |  |  |  |  |  |  |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Collaboration Revenue |  |  |  | 3,000,000 us-gaap_ProceedsFromCollaborators / us-gaap_CounterpartyNameAxis = dvax_AstraZenecaMember |  |  |  |  |  |  |
Deferred revenue recognition period |  |  | 33 months |  |  |  |  |  |  |  |
Deferred revenue | 12,800,000 us-gaap_DeferredRevenue / us-gaap_CounterpartyNameAxis = dvax_AstraZenecaMember |  |  |  |  | 12,300,000 us-gaap_DeferredRevenue / us-gaap_CounterpartyNameAxis = dvax_AstraZenecaMember |  |  |  |  |
National Institutes of Health |  |  |  |  |  |  |  |  |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Grants receivable |  |  |  |  |  |  | 200,000 us-gaap_GrantsReceivable / us-gaap_CounterpartyNameAxis = dvax_NationalInstitutesOfHealthMember |  |  |  |
National Institutes of Health | Hepatic Fibrosis and Cirrhosis |  |  |  |  |  |  |  |  |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Grants receivable |  |  |  |  |  |  |  | 200,000 us-gaap_GrantsReceivable / us-gaap_CounterpartyNameAxis = dvax_NationalInstitutesOfHealthMember / us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis = dvax_HepaticFibrosisAndCirrhosisMember |  |  |
National Institutes of Health | Autoimmune Disease |  |  |  |  |  |  |  |  |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Grants receivable |  |  |  |  |  |  |  |  | 600,000 us-gaap_GrantsReceivable / us-gaap_CounterpartyNameAxis = dvax_NationalInstitutesOfHealthMember / us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis = dvax_AutoimmuneDiseaseMember |  |
National Institutes of Health | Rheumatoid Arthritis |  |  |  |  |  |  |  |  |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Grants receivable |  |  |  |  |  |  |  |  |  | 400,000 us-gaap_GrantsReceivable / us-gaap_CounterpartyNameAxis = dvax_NationalInstitutesOfHealthMember / us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis = dvax_RheumatoidArthritisMember |
National Institute of Allergy and Infectious Diseases | Hepatitis B Virus |  |  |  |  |  |  |  |  |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Grants receivable |  |  |  |  |  |  |  |  |  |  | 1,400,000 us-gaap_GrantsReceivable / us-gaap_CounterpartyNameAxis = dvax_NationalInstituteOfAllergyAndInfectiousDiseasesMember / us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis = dvax_HepatitisBVirusMember
Amendment |  |  |  |  |  |  |  |  |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Collaboration Revenue | 8,000,000 us-gaap_ProceedsFromCollaborators / us-gaap_StatementScenarioAxis = dvax_AmendmentMember | 5,400,000 us-gaap_ProceedsFromCollaborators / us-gaap_StatementScenarioAxis = dvax_AmendmentMember |  |  | 6,000,000 us-gaap_ProceedsFromCollaborators / us-gaap_StatementScenarioAxis = dvax_AmendmentMember |  |  |  |  |  |
Amendment | Maximum |  |  |  |  |  |  |  |  |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Additional revenue recognized |  |  |  |  |  | $ 100,000,000 us-gaap_DeferredRevenueRevenueRecognized / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementScenarioAxis = dvax_AmendmentMember |  |  |  |  |

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