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Summary of Significant Accounting Policies - Summary of Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Detail) - USD ($) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2022 | Jun. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |
Total segments expenses | $ (14,298,925) |  | $ (2,805,955) | $ (33,830,890) | $ (6,636,418) | $ (13,279,780) | $ (8,358,043) | $ (5,947,294)
Selling, general and administrative | (6,845,045) |  | (939,106) | (23,892,011) | (3,265,612) | (4,898,942) | (1,233,876) | (1,739,815)
Loss from operations | (38,568,200) |  | (3,745,061) | (162,499,131) | (9,902,030) | (18,178,722) | (9,591,919) | (7,687,109)
Selling, general and administrative/New Warrants expenses |  | $ (24,269,275) | (939,106) | (128,668,241) | (3,265,612) |  |  |
Financial and foreign exchange gain, net | 2,028,854 |  | (14,041) | 3,015,420 | (57,914) | (77,147) | (34,023) | 1,590
Loss before income taxes | (36,254,346) |  | (3,759,102) | (153,356,211) | (9,959,944) | (18,255,869) | (9,625,942) | (7,685,519)
eVTOL [Member] |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |
Total segments expenses | (12,297,904) |  | (2,791,242) | (28,183,054) | (6,182,696) | (11,207,794) | (7,583,456) | (5,255,068)
UATM [Member] |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |
Total segments expenses | (1,524,028) |  | (14,713) | (4,299,873) | (453,722) | $ (2,071,986) | $ (774,587) | $ (692,226)
Service Support [Member] |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |
Total segments expenses | $ (476,993) |  | $ 0 | $ (1,347,963) | $ 0 |  |  |

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