Defined Contribution Plan (Additional Information) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2022	Sep. 30, 2022
Retirement Benefits [Abstract]
Matching Contribution	$ 0.3	$ 0.8

Defined Contribution Plan Employer Matching Contribution

No definition available.

Name:	dawn_DefinedContributionPlanEmployerMatchingContribution
Namespace Prefix:	dawn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration