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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 | $ 99,880 us-gaap_StockholdersEquity | $ 155 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  | $ 466,276 us-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 |  | 15,463,000 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Issuance of common stock upon exercise of stock options and restricted stock awards | 1,955 dvax_IssuanceOfCommonStockUponExerciseOfOptionsVestingOfRestrictedStockUnitsAndVestingOfEarlyExercisedOptionsValue | 1 dvax_IssuanceOfCommonStockUponExerciseOfOptionsVestingOfRestrictedStockUnitsAndVestingOfEarlyExercisedOptionsValue / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  | 1,954 dvax_IssuanceOfCommonStockUponExerciseOfOptionsVestingOfRestrictedStockUnitsAndVestingOfEarlyExercisedOptionsValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Issuance of common stock upon exercise of stock options and restricted stock awards (In Shares) |  | 122,000 dvax_IssuanceOfCommonStockUponExerciseOfOptionsVestingOfRestrictedStockUnitsAndVestingOfEarlyExercisedOptionsShares / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Issuance of common stock under Employee Stock Purchase Plan | 307 us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan |  |  | 307 us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Issuance of common stock under Employee Stock Purchase Plan (in shares) |  | 14,000 us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Proceeds from issuances of common stock and warrants, net of issuance costs | 71,780 dvax_IssuanceOfCommonStockAndWarrantsValue | 27 dvax_IssuanceOfCommonStockAndWarrantsValue / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  | 71,753 dvax_IssuanceOfCommonStockAndWarrantsValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Proceeds from issuances of common stock and warrants, net of issuance costs (in shares) |  | 2,680,000 dvax_IssuanceOfCommonStockAndWarrantsShares / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Stock compensation expense | 10,439 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue |  |  | 10,439 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Total other comprehensive income (loss) | 414 us-gaap_OtherComprehensiveIncomeLossNetOfTax |  |  |  | 414 us-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 | 114,826 us-gaap_StockholdersEquity | 183 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  | 550,729 us-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 |  | 18,279,000 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Issuance of common stock upon exercise of stock options and restricted stock awards | 112 dvax_IssuanceOfCommonStockUponExerciseOfOptionsVestingOfRestrictedStockUnitsAndVestingOfEarlyExercisedOptionsValue |  |  | 112 dvax_IssuanceOfCommonStockUponExerciseOfOptionsVestingOfRestrictedStockUnitsAndVestingOfEarlyExercisedOptionsValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Issuance of common stock upon exercise of stock options and restricted stock awards (In Shares) |  | 11,000 dvax_IssuanceOfCommonStockUponExerciseOfOptionsVestingOfRestrictedStockUnitsAndVestingOfEarlyExercisedOptionsShares / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Issuance of common stock under Employee Stock Purchase Plan | 224 us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan |  |  | 224 us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Issuance of common stock under Employee Stock Purchase Plan (in shares) |  | 13,000 us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Restricted Stock Award Delivered (in shares) |  | 12,000 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Issuance of common stock, net of issuance costs | 80,999 us-gaap_StockIssuedDuringPeriodValueNewIssues | 80 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  | 80,919 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Issuance of common stock, net of issuance costs (in shares) |  | 7,957,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Issuance of Series B convertible preferred stock, net of issuance costs | 44,209 us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities |  |  | 44,209 us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Issuance of Series B convertible preferred stock, net of issuance costs (in shares) |  |  | 43,000 us-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) |  | 8,000 us-gaap_DebtConversionConvertedInstrumentWarrantsOrOptionsIssued1 / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Stock compensation expense | 12,340 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue |  |  | 12,340 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Total other comprehensive income (loss) | 447 us-gaap_OtherComprehensiveIncomeLossNetOfTax |  |  |  | 447 us-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 | 186,294 us-gaap_StockholdersEquity | 263 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  | 688,390 us-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 |  | 26,280,000 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 43,000 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember |  |  |
Issuance of common stock upon exercise of stock options and restricted stock awards | 49 dvax_IssuanceOfCommonStockUponExerciseOfOptionsVestingOfRestrictedStockUnitsAndVestingOfEarlyExercisedOptionsValue |  |  | 49 dvax_IssuanceOfCommonStockUponExerciseOfOptionsVestingOfRestrictedStockUnitsAndVestingOfEarlyExercisedOptionsValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Issuance of common stock upon exercise of stock options and restricted stock awards (In Shares) |  | 5,000 dvax_IssuanceOfCommonStockUponExerciseOfOptionsVestingOfRestrictedStockUnitsAndVestingOfEarlyExercisedOptionsShares / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Reverse stock split |  | (237)us-gaap_AdjustmentsToAdditionalPaidInCapitalStockSplit / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  | 237 us-gaap_AdjustmentsToAdditionalPaidInCapitalStockSplit / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Issuance of common stock under Employee Stock Purchase Plan | 130 us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan |  |  | 130 us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Issuance of common stock under Employee Stock Purchase Plan (in shares) |  | 11,000 us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Warrants exercised | 163 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised |  |  | 163 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Warrants exercised (in shares) |  | 11,000 us-gaap_DebtConversionConvertedInstrumentWarrantsOrOptionsIssued1 / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Stock compensation expense | 6,089 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue |  |  | 6,089 us-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 | $ 100,482 us-gaap_StockholdersEquity | $ 26 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  | $ 695,058 us-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 |  | 26,307,000 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 43,000 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember |  |  |

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