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v3.19.2

Subsequent Events - Additional Information (Detail) - Emeryville, California (Premises) - Subsequent Event | Jul. 31, 2019 USD ($) ft²
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Powell Street Sublease |
Subsequent Event [Line Items] |
Lease area | ft² | 23,976
Base rent per square feet | $ | $ 3.90
Lease expiration date | Jun. 30, 2022
Horton Street Sublease |
Subsequent Event [Line Items] |
Lease area | ft² | 75,662
Base rent per square feet | $ | $ 5.50
Lease expiration date | Mar. 31, 2031

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- Definition Base rent per square feet. + References No definition available. + Details
Name: | dvax_BaseRentPerSquareFeet
Namespace Prefix: | dvax_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

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- Definition Opearting lease rent area. + References No definition available. + Details
Name: | dvax_OpeartingLeaseRentArea
Namespace Prefix: | dvax_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

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- Definition Date which lease or group of leases is set to expire, in CCYY-MM-DD format. + References No definition available. + Details
Name: | us-gaap_LeaseExpirationDate1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

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- 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 No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_LeaseArrangementTypeAxis=dvax_PowellStreetSubleaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_StatementGeographicalAxis=stpr_CA
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LeaseArrangementTypeAxis=dvax_HortonStreetSubleaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |