XML 22 R55.htm IDEA: XBRL DOCUMENT v2.4.1.9
Preferred Stock, Common Stock and Warrants - Additional Information (Detail) (USD $)
 0 Months Ended 1 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended
Nov. 04, 2008
Oct. 31, 2013
Dec. 31, 2013
Nov. 10, 2014
Dec. 31, 2014
Preferred Stock Common Stock And Warrants [Line Items]          
Preferred stock, shares authorized     5,000,000us-gaap_PreferredStockSharesAuthorized   5,000,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares outstanding         43,430us-gaap_PreferredStockSharesOutstanding
Issuance of common stock, net of issuance costs (in shares)   7,957,000us-gaap_StockIssuedDuringPeriodSharesNewIssues      
Preferred stock, par value $ 0.001us-gaap_PreferredStockParOrStatedValuePerShare   0.001us-gaap_PreferredStockParOrStatedValuePerShare   $ 0.001us-gaap_PreferredStockParOrStatedValuePerShare
Public offering net price per share   $ 1.075us-gaap_EquityIssuancePerShareAmount      
Common stock, par value $ 0.001us-gaap_CommonStockParOrStatedValuePerShare   0.001us-gaap_CommonStockParOrStatedValuePerShare   $ 0.001us-gaap_CommonStockParOrStatedValuePerShare
Dividends payable date Nov. 17, 2008        
Preferred shares price $ 6.00us-gaap_SharePrice        
Rights expiration date Nov. 17, 2018        
Warrants to purchase common stock         1,100,000dvax_WarrantToPurchaseCommonStock
Warrants exercise price         $ 15.00us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Number Of Warrants Exercised During Period     25,000dvax_NumberOfWarrantsExercisedDuringPeriod   11,000dvax_NumberOfWarrantsExercisedDuringPeriod
Common Stock          
Preferred Stock Common Stock And Warrants [Line Items]          
Issuance of common stock, net of issuance costs (in shares)     7,957,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		    
Gross proceeds from issuance of stock   $ 85,500,000us-gaap_ProceedsFromIssuanceOrSaleOfEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		      
Issuance costs   4,500,000us-gaap_PaymentsOfStockIssuanceCosts
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		      
Net proceeds from offering   80,900,000us-gaap_ProceedsFromIssuanceInitialPublicOffering
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		      
Minimum          
Preferred Stock Common Stock And Warrants [Line Items]          
Percentage of common shares outstanding 20.00%dvax_PercentageOfCommonSharesOutstanding
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		        
Percentage of assets 50.00%dvax_PercentageOfCompanyAssets
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		        
Maximum | Cowen          
Preferred Stock Common Stock And Warrants [Line Items]          
Common stock sales agreement aggregate sales proceeds       50,000,000dvax_CommonStockSalesAgreementAggregateSalesProceeds
/ us-gaap_CounterpartyNameAxis
= dvax_CowenMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		  
Commission on gross sales proceeds of common stock       3.00%dvax_SellingCommissionPercentageFromGrossOfferingProceedsOfSalesOfStock
/ us-gaap_CounterpartyNameAxis
= dvax_CowenMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		  
Series B Convertible Preferred Stock          
Preferred Stock Common Stock And Warrants [Line Items]          
Preferred stock, shares outstanding     43,430us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_ConvertiblePreferredStockMember		   43,430us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_ConvertiblePreferredStockMember
Issuance of common stock, net of issuance costs (in shares)   43,430us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementClassOfStockAxis
= us-gaap_ConvertiblePreferredStockMember		      
Preferred stock, par value   $ 0.001us-gaap_PreferredStockParOrStatedValuePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_ConvertiblePreferredStockMember		      
Public offering net price per share   $ 1.075us-gaap_EquityIssuancePerShareAmount
/ us-gaap_StatementClassOfStockAxis
= us-gaap_ConvertiblePreferredStockMember		      
Gross proceeds from issuance of stock   46,700,000us-gaap_ProceedsFromIssuanceOrSaleOfEquity
/ us-gaap_StatementClassOfStockAxis
= us-gaap_ConvertiblePreferredStockMember		      
Issuance costs   2,500,000us-gaap_PaymentsOfStockIssuanceCosts
/ us-gaap_StatementClassOfStockAxis
= us-gaap_ConvertiblePreferredStockMember		      
Net proceeds from offering   44,200,000us-gaap_ProceedsFromIssuanceInitialPublicOffering
/ us-gaap_StatementClassOfStockAxis
= us-gaap_ConvertiblePreferredStockMember		      
Convertible common stock shares         100us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion
/ us-gaap_StatementClassOfStockAxis
= us-gaap_ConvertiblePreferredStockMember
Convertible preferred stock, terms of conversion         The holder is prohibited from converting the Series B Convertible Preferred Stock into shares of common stock if, as a result of such conversion, the holder and its affiliates would own more than 9.98% of the total number of shares of common stock then issued and outstanding.
Convertible preferred stock, settlement terms         In the event of the Company’s liquidation, dissolution, or winding up, holders of Series B Convertible Preferred Stock will receive a payment equal to $0.001 per share before any proceeds are distributed to the common stockholders.
Maximum percentage of shares of common stock issued and outstanding from conversion of preferred stock         9.98%dvax_MaximumPercentageOfSharesOfCommonStockIssuedAndOutstandingFromConversionOfPreferredStock
/ us-gaap_StatementClassOfStockAxis
= us-gaap_ConvertiblePreferredStockMember
Convertible common stock exceeded allocated purchase price of preferred stock         $ 8,500,000dvax_FairValueOfAllocatedCommonStockExceededConvertiblePreferredStockPurchasePriceOnDateOfIssuance
/ us-gaap_StatementClassOfStockAxis
= us-gaap_ConvertiblePreferredStockMember