XML 52 R38.htm IDEA: XBRL DOCUMENT
v3.20.2

Cash, Cash Equivalents, Restricted Cash and Marketable Securities - Summary of Cash, Cash Equivalents and Marketable Securities (Detail) - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Cash Cash Equivalents And Marketable Securities [Line Items] |  |
Amortized Cost | $ 200,444 | $ 150,983
Unrealized Gains | 278 | 84
Unrealized Losses | (14) | (12)
Estimated Fair Value | 200,708 | 151,055
Cash and Cash Equivalents |  |
Cash Cash Equivalents And Marketable Securities [Line Items] |  |
Amortized Cost | 60,485 | 39,884
Unrealized Gains | 1 |
Unrealized Losses | (1) |
Estimated Fair Value | 60,485 | 39,884
Marketable Securities Available-for-Sale |  |
Cash Cash Equivalents And Marketable Securities [Line Items] |  |
Amortized Cost | 139,959 | 111,099
Unrealized Gains | 277 | 84
Unrealized Losses | (13) | (12)
Estimated Fair Value | 140,223 | 111,171
Cash | Cash and Cash Equivalents |  |
Cash Cash Equivalents And Marketable Securities [Line Items] |  |
Amortized Cost | 7,735 | 4,038
Estimated Fair Value | 7,735 | 4,038
Money Market Funds | Cash and Cash Equivalents |  |
Cash Cash Equivalents And Marketable Securities [Line Items] |  |
Amortized Cost | 24,187 | 27,854
Estimated Fair Value | 24,187 | 27,854
U.S. Treasuries | Cash and Cash Equivalents |  |
Cash Cash Equivalents And Marketable Securities [Line Items] |  |
Amortized Cost | 5,999 |
Estimated Fair Value | 5,999 |
U.S. Treasuries | Marketable Securities Available-for-Sale |  |
Cash Cash Equivalents And Marketable Securities [Line Items] |  |
Amortized Cost | 16,159 | 6,511
Unrealized Gains | 64 | 6
Estimated Fair Value | 16,223 | 6,517
Corporate Debt Securities | Cash and Cash Equivalents |  |
Cash Cash Equivalents And Marketable Securities [Line Items] |  |
Amortized Cost | 22,564 | 7,992
Unrealized Gains | 1 |
Unrealized Losses | (1) |
Estimated Fair Value | 22,564 | 7,992
Corporate Debt Securities | Marketable Securities Available-for-Sale |  |
Cash Cash Equivalents And Marketable Securities [Line Items] |  |
Amortized Cost | 69,539 | 53,353
Unrealized Gains | 62 | 28
Unrealized Losses | (6) |
Estimated Fair Value | 69,595 | 53,381
U.S. Government Agency Securities | Marketable Securities Available-for-Sale |  |
Cash Cash Equivalents And Marketable Securities [Line Items] |  |
Amortized Cost | 54,261 | 51,235
Unrealized Gains | 151 | 50
Unrealized Losses | (7) | (12)
Estimated Fair Value | $ 54,405 | $ 51,273

X
- Definition Cash, cash equivalents and marketable securities + References No definition available. + Details
Name: | dvax_CashCashEquivalentsAndMarketableSecuritiesLineItems
Namespace Prefix: | dvax_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesAmortizedCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_CashAndCashEquivalentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InformationByCategoryOfDebtSecurityAxis=us-gaap_AvailableforsaleSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_CashMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_MoneyMarketFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_USGovernmentAgenciesDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |