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Revenue Recognition - Additional Information (Detail)	Mar. 31, 2018 USD ($)
Revenue Recognition [Abstract]
Reserves classified as reduction of accounts receivable	$ 66,000
Reserves classified as accrued liabilities	$ 19,000

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- Definition

Product revenue allowance and reserves classified as accrued liabilities.

+ References

No definition available.

+ Details

Name:	dvax_ProductRevenueAllowanceAndReservesClassifiedAsAccruedLiabilities
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

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- References

No definition available.

+ Details

Name:	us-gaap_RevenueRecognitionAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration