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Revenue Recognition - Additional Information (Detail) $ in Millions	Sep. 30, 2018 USD ($)
Product Revenue Allowance and Revenue Categories [Line Items]
Remaining reserves balances recorded as accrued liabilities	$ 0.5
Chargebacks and Discounts
Product Revenue Allowance and Revenue Categories [Line Items]
Reserves recorded as reduction of accounts receivable	$ 0.9

X

- Definition

Product revenue allowance and remaining reserves classified as accrued liabilities.

+ References

No definition available.

+ Details

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Namespace Prefix:	dvax_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Product revenue allowance and reserves classified as reduction in accounts receivable.

+ References

No definition available.

+ Details

Name:	dvax_ProductRevenueAllowanceAndReservesClassifiedAsReductionInAccountsReceivable
Namespace Prefix:	dvax_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	srt_ValuationAndQualifyingAccountsDisclosureLineItems
Namespace Prefix:	srt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_ValuationAllowancesAndReservesTypeAxis=dvax_ChargebacksDiscountsAndOtherFeesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: