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Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data	Total USD ($)	Common Stock USD ($)	Preferred Stock	Additional Paid-in Capital USD ($)	Accumulated Other Comprehensive Income (Loss) USD ($)	Accumulated Deficit USD ($)
Beginning Balances at Dec. 31, 2011	$ 99,880us-gaap_StockholdersEquity	$ 155us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember		$ 466,276us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	$ (1,009)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember	$ (365,542)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Beginning Balances (in shares) at Dec. 31, 2011		15,463,000us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Issuance of common stock upon exercise of stock options and restricted stock awards	1,955dvax_IssuanceOfCommonStockUponExerciseOfOptionsVestingOfRestrictedStockUnitsAndVestingOfEarlyExercisedOptionsValue	1dvax_IssuanceOfCommonStockUponExerciseOfOptionsVestingOfRestrictedStockUnitsAndVestingOfEarlyExercisedOptionsValue / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember		1,954dvax_IssuanceOfCommonStockUponExerciseOfOptionsVestingOfRestrictedStockUnitsAndVestingOfEarlyExercisedOptionsValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember
Issuance of common stock upon exercise of stock options and restricted stock awards (In Shares)		122,000dvax_IssuanceOfCommonStockUponExerciseOfOptionsVestingOfRestrictedStockUnitsAndVestingOfEarlyExercisedOptionsShares / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Issuance of common stock under Employee Stock Purchase Plan	307us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan			307us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember
Issuance of common stock under Employee Stock Purchase Plan (in shares)		14,000us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Proceeds from issuances of common stock and warrants, net of issuance costs	71,780dvax_IssuanceOfCommonStockAndWarrantsValue	27dvax_IssuanceOfCommonStockAndWarrantsValue / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember		71,753dvax_IssuanceOfCommonStockAndWarrantsValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember
Proceeds from issuances of common stock and warrants, net of issuance costs (in shares)		2,680,000dvax_IssuanceOfCommonStockAndWarrantsShares / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Stock compensation expense	10,439us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue			10,439us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember
Total other comprehensive income (loss)	414us-gaap_OtherComprehensiveIncomeLossNetOfTax				414us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Net loss	(69,949)us-gaap_NetIncomeLoss					(69,949)us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Ending Balances at Dec. 31, 2012	114,826us-gaap_StockholdersEquity	183us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember		550,729us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	(595)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember	(435,491)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Ending Balances (in shares) at Dec. 31, 2012		18,279,000us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Issuance of common stock upon exercise of stock options and restricted stock awards	112dvax_IssuanceOfCommonStockUponExerciseOfOptionsVestingOfRestrictedStockUnitsAndVestingOfEarlyExercisedOptionsValue			112dvax_IssuanceOfCommonStockUponExerciseOfOptionsVestingOfRestrictedStockUnitsAndVestingOfEarlyExercisedOptionsValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember
Issuance of common stock upon exercise of stock options and restricted stock awards (In Shares)		11,000dvax_IssuanceOfCommonStockUponExerciseOfOptionsVestingOfRestrictedStockUnitsAndVestingOfEarlyExercisedOptionsShares / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Issuance of common stock under Employee Stock Purchase Plan	224us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan			224us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember
Issuance of common stock under Employee Stock Purchase Plan (in shares)		13,000us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Restricted Stock Award Delivered (in shares)		12,000us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Issuance of common stock, net of issuance costs	80,999us-gaap_StockIssuedDuringPeriodValueNewIssues	80us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember		80,919us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember
Issuance of common stock, net of issuance costs (in shares)		7,957,000us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Issuance of Series B convertible preferred stock, net of issuance costs	44,209us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities			44,209us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember
Issuance of Series B convertible preferred stock, net of issuance costs (in shares)			43,000us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember
Initial expenses related to ATM agreement	(143)us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts			(143)us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember
Warrants exercised (in shares)		8,000us-gaap_DebtConversionConvertedInstrumentWarrantsOrOptionsIssued1 / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Stock compensation expense	12,340us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue			12,340us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember
Total other comprehensive income (loss)	447us-gaap_OtherComprehensiveIncomeLossNetOfTax				447us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Net loss	(66,720)us-gaap_NetIncomeLoss					(66,720)us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Ending Balances at Dec. 31, 2013	186,294us-gaap_StockholdersEquity	263us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember		688,390us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	(148)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember	(502,211)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Ending Balances (in shares) at Dec. 31, 2013		26,280,000us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	43,000us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember
Issuance of common stock upon exercise of stock options and restricted stock awards	49dvax_IssuanceOfCommonStockUponExerciseOfOptionsVestingOfRestrictedStockUnitsAndVestingOfEarlyExercisedOptionsValue			49dvax_IssuanceOfCommonStockUponExerciseOfOptionsVestingOfRestrictedStockUnitsAndVestingOfEarlyExercisedOptionsValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember
Issuance of common stock upon exercise of stock options and restricted stock awards (In Shares)		5,000dvax_IssuanceOfCommonStockUponExerciseOfOptionsVestingOfRestrictedStockUnitsAndVestingOfEarlyExercisedOptionsShares / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Reverse stock split		(237)us-gaap_AdjustmentsToAdditionalPaidInCapitalStockSplit / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember		237us-gaap_AdjustmentsToAdditionalPaidInCapitalStockSplit / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember
Issuance of common stock under Employee Stock Purchase Plan	130us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan			130us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember
Issuance of common stock under Employee Stock Purchase Plan (in shares)		11,000us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Warrants exercised	163us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised			163us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember
Warrants exercised (in shares)		11,000us-gaap_DebtConversionConvertedInstrumentWarrantsOrOptionsIssued1 / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Stock compensation expense	6,089us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue			6,089us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember
Total other comprehensive income (loss)	(1,521)us-gaap_OtherComprehensiveIncomeLossNetOfTax				(1,521)us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Net loss	(90,722)us-gaap_NetIncomeLoss					(90,722)us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Ending Balances at Dec. 31, 2014	$ 100,482us-gaap_StockholdersEquity	$ 26us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember		$ 695,058us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	$ (1,669)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember	$ (592,933)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Ending Balances (in shares) at Dec. 31, 2014		26,307,000us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember	43,000us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember

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