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Commitments and Contingencies - Additional Information (Detail) | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Jul. 31, 2021 USD ($) Engine | Sep. 30, 2021 USD ($) Engine Lawsuit | Mar. 31, 2021 USD ($) | Feb. 28, 2021 USD ($)
Forward Purchase Contract [Member] | Heart Aerospace Incorporated [Member] | Maximum [Member] |  |  |  |
Purchase Commitment Excluding Longterm Commitment [Line Items] |  |  |  |
Purchase commitment amount | $ 1,200,000,000.0 |  |  |
CF34-8C5 or CF34-8E5 Engines [Member] | Letter Agreement No. 13-3 [Member] |  |  |  |
Purchase Commitment Excluding Longterm Commitment [Line Items] |  |  |  |
Number of new spare engines to be acquired | Engine | 1 | 10 |  |
New spare engines delivery month and year description |  | The Company agreed to purchase and take delivery of ten (10) new CF34-8C5 or CF34-8E5 engines with delivery dates starting from July 1, 2021 through November 1, 2022. During the quarter ended March 31, 2021, a $7.0 million non-refundable purchase deposit was made for the first five engines to be delivered in calendar year 2021. |  |
Purchase deposit |  |  | $ 7,000,000.0 |
Number of new spare engines to be delivered | Engine |  | 5 |  |
Number of additional spare engines to be acquired beyond 2022 | Engine |  | 10 |  |
Purchase commitment amount |  | $ 52,200,000 |  |
eVTOL Aircraft [Member] | Forward Purchase Contract [Member] | Archer Aviation, Inc. [Member] |  |  |  |
Purchase Commitment Excluding Longterm Commitment [Line Items] |  |  |  |
Purchase commitment amount |  |  |  | $ 200,000,000.0
IPO [Member] |  |  |  |
Purchase Commitment Excluding Longterm Commitment [Line Items] |  |  |  |
Number of putative class action lawsuits | Lawsuit |  | 2 |  |
Superior Court of State of Arizona [Member] | IPO [Member] |  |  |  |
Purchase Commitment Excluding Longterm Commitment [Line Items] |  |  |  |
Number of putative class action lawsuits | Lawsuit |  | 1 |  |
U.S. District Court of Arizona [Member] | IPO [Member] |  |  |  |
Purchase Commitment Excluding Longterm Commitment [Line Items] |  |  |  |
Number of putative class action lawsuits | Lawsuit |  | 1 |  |

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