Commitments and Contingencies (Q3) (Details) - SeaStar Medical Holding Corporation [Member] - USD ($) $ in Thousands		9 Months Ended
Dec. 27, 2022	Sep. 30, 2023
Commitments and Contingencies [Abstract]
Milestone payments	$ 450
Payment period after achievement of milestone event		30 days

Maximum period after achievement of the milestone event, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	nuwe_PaymentPeriodAfterAchievementOfMilestoneEvent
Namespace Prefix:	nuwe_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration