XML 19 R52.htm IDEA: XBRL DOCUMENT
v3.20.1

Net Loss Per Share - Additional Information (Detail) - shares | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Series B Convertible Preferred Stock |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Outstanding securities excluded from the calculation of diluted net loss per share | 4,840,000 |
Stock Options and Stock Awards |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Outstanding securities excluded from the calculation of diluted net loss per share | 11,443,432 | 8,946,000

X
- Definition Earnings per share disclosure. + References No definition available. + Details
Name: | dvax_EarningsPerShareDisclosureLineItems
Namespace Prefix: | dvax_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
Name: | us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=dvax_SeriesBConvertiblePreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=dvax_StockOptionsAndShareAwardsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |