XML 30 R39.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Summary of Cash, Cash Equivalents and Marketable Securities Available-for-sale (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Cash Cash Equivalents And Marketable Securities [Line Items] |  |
Amortized Cost | $ 189,407 | $ 125,085
Unrealized Gains | 16 | 46
Unrealized Losses | (47) | (1)
Estimated Fair Value | 189,376 | 125,130
Cash and Cash Equivalents |  |
Cash Cash Equivalents And Marketable Securities [Line Items] |  |
Amortized Cost | 23,122 | 7,599
Estimated Fair Value | 23,122 | 7,599
Cash and Cash Equivalents | Cash |  |
Cash Cash Equivalents And Marketable Securities [Line Items] |  |
Amortized Cost | 1,766 | 1,542
Estimated Fair Value | 1,766 | 1,542
Cash and Cash Equivalents | Money market funds |  |
Cash Cash Equivalents And Marketable Securities [Line Items] |  |
Amortized Cost | 20,013 | 3,140
Estimated Fair Value | 20,013 | 3,140
Cash and Cash Equivalents | US Government Agencies Debt Securities |  |
Cash Cash Equivalents And Marketable Securities [Line Items] |  |
Amortized Cost | 1,343 | 2,202
Estimated Fair Value | 1,343 | 2,202
Cash and Cash Equivalents | Municipal Securities |  |
Cash Cash Equivalents And Marketable Securities [Line Items] |  |
Amortized Cost |  | 715
Estimated Fair Value |  | 715
Available-for-sale Securities |  |
Cash Cash Equivalents And Marketable Securities [Line Items] |  |
Amortized Cost | 166,285 | 117,486
Unrealized Gains | 16 | 46
Unrealized Losses | (47) | (1)
Estimated Fair Value | 166,254 | 117,531
Available-for-sale Securities | US Government Agencies Debt Securities |  |
Cash Cash Equivalents And Marketable Securities [Line Items] |  |
Amortized Cost | 166,285 | 116,986
Unrealized Gains | 16 | 46
Unrealized Losses | (47) | (1)
Estimated Fair Value | 166,254 | 117,031
Available-for-sale Securities | US Treasury Securities |  |
Cash Cash Equivalents And Marketable Securities [Line Items] |  |
Amortized Cost |  | 500
Estimated Fair Value |  | $ 500

X
- Definition Amount of accumulated pre-tax unrealized gain before deducting pre-tax unrealized losses on investments in available-for-sale securities impacting investments. + References No definition available. + Details
Name: | dvax_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
Namespace Prefix: | dvax_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated pre-tax unrealized loss before deducting pre-tax unrealized gain on investments in available-for-sale securities impacting investments. + References No definition available. + Details
Name: | dvax_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
Namespace Prefix: | dvax_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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 Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 + Details
Name: | us-gaap_AvailableForSaleSecurities
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 Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_AvailableForSaleSecuritiesAmortizedCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant