Defined Contribution Plan (Additional Information) (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Retirement Benefits [Abstract]
Matching Contribution	$ 200	$ 0

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