Commitments and Contingencies - Additional Information (Details) $ in Millions	6 Months Ended
Jun. 30, 2021 USD ($)
Commitments And Contingencies Disclosure [Abstract]
Aggregate cash related to research and development activities	$ 1.8
Cash refund related to research and development activities received	$ 1.2

Cash refund related to research and development activities received.

No definition available.

Name:	dbtx_CashRefundRelatedToResearchAndDevelopmentActivitiesReceived
Namespace Prefix:	dbtx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration