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Consolidated Statements Of Cash Flows (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Operating activities      
Net loss $ (90,722)us-gaap_NetIncomeLoss $ (66,720)us-gaap_NetIncomeLoss $ (69,949)us-gaap_NetIncomeLoss
Adjustments to reconcile net loss to net cash used in operating activities:      
Depreciation and amortization 1,404us-gaap_DepreciationAndAmortization 1,327us-gaap_DepreciationAndAmortization 1,207us-gaap_DepreciationAndAmortization
(Gain) loss on disposal of property and equipment (24)us-gaap_GainLossOnSaleOfPropertyPlantEquipment 18us-gaap_GainLossOnSaleOfPropertyPlantEquipment 8us-gaap_GainLossOnSaleOfPropertyPlantEquipment
Accretion of discounts and amortization of premiums of marketable securities 881us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments 923us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments 1,298us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments
Interest associated with long-term note payable to Symphony Dynamo Holdings LLC (“Holdings")     2,190us-gaap_AmortizationOfFinancingCosts
Loss on lease 386us-gaap_ProvisionForLeaseLosses 926us-gaap_ProvisionForLeaseLosses  
Stock compensation expense 6,089us-gaap_ShareBasedCompensation 12,340us-gaap_ShareBasedCompensation 10,439us-gaap_ShareBasedCompensation
Changes in operating assets and liabilities:      
Accounts receivable 900us-gaap_IncreaseDecreaseInAccountsReceivable (622)us-gaap_IncreaseDecreaseInAccountsReceivable 8,522us-gaap_IncreaseDecreaseInAccountsReceivable
Prepaid expenses and other current assets (2,683)us-gaap_IncreaseDecreaseInOtherCurrentAssets 677us-gaap_IncreaseDecreaseInOtherCurrentAssets (922)us-gaap_IncreaseDecreaseInOtherCurrentAssets
Restricted cash and other assets 277dvax_IncreaseDecreaseInRestrictedCashAndOtherAssetsForOperatingActivities 176dvax_IncreaseDecreaseInRestrictedCashAndOtherAssetsForOperatingActivities (116)dvax_IncreaseDecreaseInRestrictedCashAndOtherAssetsForOperatingActivities
Accounts payable (523)us-gaap_IncreaseDecreaseInAccountsPayable (657)us-gaap_IncreaseDecreaseInAccountsPayable 126us-gaap_IncreaseDecreaseInAccountsPayable
Accrued liabilities and other long term liabilities 4,810us-gaap_IncreaseDecreaseInOtherOperatingLiabilities (2,291)us-gaap_IncreaseDecreaseInOtherOperatingLiabilities 1,916us-gaap_IncreaseDecreaseInOtherOperatingLiabilities
Deferred revenues 5,467us-gaap_IncreaseDecreaseInDeferredRevenue (4,770)us-gaap_IncreaseDecreaseInDeferredRevenue 1,472us-gaap_IncreaseDecreaseInDeferredRevenue
Net cash used in operating activities (73,738)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations (58,673)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations (43,809)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
Investing activities      
Purchases of marketable securities (44,807)us-gaap_PaymentsToAcquireMarketableSecurities (192,044)us-gaap_PaymentsToAcquireMarketableSecurities (206,149)us-gaap_PaymentsToAcquireMarketableSecurities
Proceeds from maturities of marketable securities 137,071us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities 142,321us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities 169,387us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities
Purchases of property and equipment, net (1,667)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment (1,629)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment (2,931)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Net cash provided by (used in) investing activities 90,597us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations (51,352)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations (39,693)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
Financing activities      
Proceeds from issuances of common stock   80,856us-gaap_ProceedsFromIssuanceOfCommonStock 71,780us-gaap_ProceedsFromIssuanceOfCommonStock
Proceeds from issuances of preferred stock   44,209us-gaap_ProceedsFromIssuanceOfPreferredStockAndPreferenceStock  
Proceeds from exercise of stock options and restricted stock awards 49us-gaap_ProceedsFromStockOptionsExercised 112us-gaap_ProceedsFromStockOptionsExercised 1,955us-gaap_ProceedsFromStockOptionsExercised
Proceeds from Employee Stock Purchase Plan 130us-gaap_ProceedsFromStockPlans 224us-gaap_ProceedsFromStockPlans 307us-gaap_ProceedsFromStockPlans
Proceeds from exercise of warrants 163us-gaap_ProceedsFromIssuanceOfWarrants    
Proceeds from long-term debt payable to Hercules, net 9,559us-gaap_ProceedsFromIssuanceOfLongTermDebt    
Payment of notes payable to Holdings     (15,000)us-gaap_RepaymentsOfNotesPayable
Net cash provided by financing activities 9,901us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations 125,401us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations 59,042us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
Effect of exchange rate changes on cash and cash equivalents (371)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents 147us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents 118us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
Net increase (decrease) in cash and cash equivalents 26,389us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease 15,523us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease (24,342)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents at beginning of year 23,122us-gaap_CashAndCashEquivalentsAtCarryingValue 7,599us-gaap_CashAndCashEquivalentsAtCarryingValue 31,941us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents at end of year 49,511us-gaap_CashAndCashEquivalentsAtCarryingValue 23,122us-gaap_CashAndCashEquivalentsAtCarryingValue 7,599us-gaap_CashAndCashEquivalentsAtCarryingValue
Non-cash investing and financing activities:      
Disposal of fully depreciated property and equipment 841dvax_SupplementalDisposalOfAssets 86dvax_SupplementalDisposalOfAssets 169dvax_SupplementalDisposalOfAssets
Net change in unrealized gain (loss) on marketable securities $ 32us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax $ (76)us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax $ 48us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax