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Subsequent Events (Details) - Subsequent Event - USD ($) $ in Millions | Oct. 28, 2024 | Nov. 07, 2024
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Subsequent Event [Line Items] |  |
Share Repurchase Program, Authorized, Amount |  | $ 200.0
Preferred Stock |  |
Subsequent Event [Line Items] |  |
Number of preferred share purchase rights per common share | 1 |
Class of warrant or right, number of securities called by each warrant or right | 0.001 |
Right expiration period | 1 year |
Class of warrant or right, terms, exercisable threshold percentage | 15.00% |

X
- Definition Class Of Warrant Or Right, Dividends Distribution, Number Of Rights + References No definition available. + Details
Name: | dvax_ClassOfWarrantOrRightDividendsDistributionNumberOfRights
Namespace Prefix: | dvax_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Class Of Warrant Or Right, Term + References No definition available. + Details
Name: | dvax_ClassOfWarrantOrRightTerm
Namespace Prefix: | dvax_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Class Of Warrant Or Right, Terms, Exercisable Threshold Percentage + References No definition available. + Details
Name: | dvax_ClassOfWarrantOrRightTermsExercisableThresholdPercentage
Namespace Prefix: | dvax_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Amount authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 505 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481520/505-30-50-4 + Details
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Namespace Prefix: | srt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481674/830-30-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 855 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483399/855-10-50-2 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=dvax_PreferredSharePurchaseRightsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |