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Commitments and Contingencies - Additional Information (Detail) | 12 Months Ended |  |  | 12 Months Ended |  |  | 3 Months Ended |  | 3 Months Ended |
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Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($) | Dec. 31, 2012 USD ($) | Dec. 31, 2014 Deutsche Bank Securities EUR (€) | Dec. 31, 2013 Deutsche Bank Securities EUR (€) | Dec. 31, 2014 Berkeley, California (the "Berkeley Lease") USD ($) | Dec. 31, 2013 Berkeley, California (the "Berkeley Lease") USD ($) | Dec. 31, 2014 Dusseldorf, Germany (the "Dusseldorf Lease") | Dec. 31, 2014 Berkeley, California (the "Berkeley Lease") USD ($) | Dec. 31, 2013 Berkeley, California (the "Berkeley Lease") USD ($) | Dec. 31, 2004 Berkeley, California (the "Berkeley Lease") USD ($) | Dec. 31, 2004 Berkeley, California (the "Berkeley Lease") Contingency, B | Dec. 31, 2004 Berkeley, California (the "Berkeley Lease") Contingency, B Minimum USD ($) | Dec. 31, 2004 Berkeley, California (the "Berkeley Lease") Contingency, A USD ($) | Dec. 31, 2004 Berkeley, California (the "Berkeley Lease") Contingency, A Minimum | Dec. 31, 2004 Berkeley, California (the "Berkeley Lease") Contingency, A Maximum USD ($)
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating leases expiration date |  |  |  |  |  | 2018-06 |  | 2023-03 | 2018-06 |  |  |  |  |  |  |
Unoccupied facility expense | $ 386,000 us-gaap_BusinessExitCosts1 | $ 926,000 us-gaap_BusinessExitCosts1 |  |  |  | $ 400,000 us-gaap_BusinessExitCosts1 / us-gaap_StatementGeographicalAxis = stpr_CA | $ 900,000 us-gaap_BusinessExitCosts1 / us-gaap_StatementGeographicalAxis = stpr_CA |  |  |  |  |  |  |  |  |
Rent expense, net | 1,700,000 us-gaap_OperatingLeasesRentExpenseNet | 1,900,000 us-gaap_OperatingLeasesRentExpenseNet | 1,700,000 us-gaap_OperatingLeasesRentExpenseNet |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred rent | 600,000 us-gaap_DeferredRentCredit | 600,000 us-gaap_DeferredRentCredit |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred gain (loss) on lease | (700,000)us-gaap_GainLossOnSaleOfLeasedAssetsNetOperatingLeases | (700,000)us-gaap_GainLossOnSaleOfLeasedAssetsNetOperatingLeases |  |  |  |  |  |  |  |  |  |  |  |  |  |
Letter of credit pledged as security |  |  |  | 200,000 us-gaap_PledgedAssetsSeparatelyReportedSecuritiesPledgedUnderLetterOfCreditFacilitiesAtFairValue / us-gaap_LossContingenciesByNatureOfContingencyAxis = dvax_DeutscheBankSecuritiesMember |  |  |  |  |  |  | 400,000 us-gaap_PledgedAssetsSeparatelyReportedSecuritiesPledgedUnderLetterOfCreditFacilitiesAtFairValue / us-gaap_StatementGeographicalAxis = dvax_CaliforniaMember |  |  |  |  |
Collateralized certificate of deposit |  |  |  | 200,000 us-gaap_SecurityOwnedAndPledgedAsCollateralFairValue / us-gaap_LossContingenciesByNatureOfContingencyAxis = dvax_DeutscheBankSecuritiesMember | 200,000 us-gaap_SecurityOwnedAndPledgedAsCollateralFairValue / us-gaap_LossContingenciesByNatureOfContingencyAxis = dvax_DeutscheBankSecuritiesMember |  |  |  | 400,000 us-gaap_SecurityOwnedAndPledgedAsCollateralFairValue / us-gaap_StatementGeographicalAxis = dvax_CaliforniaMember | 400,000 us-gaap_SecurityOwnedAndPledgedAsCollateralFairValue / us-gaap_StatementGeographicalAxis = dvax_CaliforniaMember |  |  |  |  |  |
Terms of the lease |  |  |  |  |  | If the total amount of our cash, cash equivalents and marketable securities falls below $20 million for a period of more than 30 consecutive days during the lease term, the amount of the required security deposit will increase to $1.1 million, until such time as our projected cash and cash equivalents will exceed $20 million for the remainder of the lease term, or until our actual cash and cash equivalents remains above $20 million for a period of 12 consecutive months. |  |  | If the total amount of our cash, cash equivalents and marketable securities falls below $20 million for a period of more than 30 consecutive days during the lease term, the amount of the required security deposit will increase to $1.1 million, until such time as our projected cash and cash equivalents will exceed $20 million for the remainder of the lease term, or until our actual cash and cash equivalents remains above $20 million for a period of 12 consecutive months. |  |  |  |  |  |  |
Cash, cash equivalents and marketable securities | 122,700,000 us-gaap_CashCashEquivalentsAndShortTermInvestments |  |  |  |  |  |  |  |  |  |  |  | 20,000,000 us-gaap_CashCashEquivalentsAndShortTermInvestments / us-gaap_LossContingenciesByNatureOfContingencyAxis = dvax_ContingencyBMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementGeographicalAxis = dvax_CaliforniaMember |  |  | 20,000,000 us-gaap_CashCashEquivalentsAndShortTermInvestments / us-gaap_LossContingenciesByNatureOfContingencyAxis = dvax_ContingencyAMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementGeographicalAxis = dvax_CaliforniaMember
Contingency period for cash, cash equivalents and marketable securities |  |  |  |  |  |  |  |  |  |  |  | 12 months |  |  | 30 days |
Increase in amount of the security deposit |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,100,000 us-gaap_IncreaseDecreaseInSecurityDeposits / us-gaap_LossContingenciesByNatureOfContingencyAxis = dvax_ContingencyAMember / us-gaap_StatementGeographicalAxis = dvax_CaliforniaMember |  |
Future payments obligation | $ 25,500,000 us-gaap_LongTermPurchaseCommitmentAmount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Includes, but is not limited to, one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and termination benefits associated with an ongoing benefit arrangement. Excludes expenses associated with special or contractual termination benefits, a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 + Details
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