Parent Investment, Net (Predecessor) (Details) - United Maritime Predecessor [Member] - USD ($)	6 Months Ended	12 Months Ended
Jul. 05, 2022	Dec. 31, 2021	Dec. 31, 2020
Capital Contribution [Abstract]
Capital contributions by Parent	$ 1,253,526		$ 1,960,687
Capital distributions to Parent		$ 2,441,795

Net amounts contributed by the Parent to finance part of the acquisition cost of the vessel, commercial and management services, intercompany amounts due to or from the Parent for working capital purposes, which are forgiven and treated as contributions of capital.

No definition available.

Name:	usea_ContributionsByParentNet
Namespace Prefix:	usea_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration