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Inventories, Net - Additional Information (Detail) $ in Thousands	Dec. 31, 2020 USD ($)
Inventory Disclosure [Abstract]
Prepaid manufacturing	$ 29,423

X

- Definition

Prepaid Manufacturing.

+ References

No definition available.

+ Details

Name:	dvax_PrepaidManufacturing
Namespace Prefix:	dvax_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

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