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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

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