Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total research and development expenses	$ 32,419	$ 28,642	$ 96,191	$ 71,992
(Income)/expense not allocated to segments, net	2,942	1,470	(164)	14,826
Loss before income taxes	(35,361)	(30,112)	(96,027)	(86,817)
eVTOL [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total research and development expenses	29,965	25,777	88,047	65,601
UATM [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total research and development expenses	1,428	1,259	3,846	3,120
Service and Operations Solutions
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total research and development expenses	$ 1,026	$ 1,606	$ 4,299	$ 3,270