Summary of Significant Accounting Policies (Tables)
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9 Months Ended |
Sep. 30, 2025 |
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| Accounting Policies [Abstract] |
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| Schedule of Receivables, Net |
The table below sets forth the major categories that make up the balances as of the dates presented: | | | | | | | | | | | | | September 30, 2025 | | December 31, 2024 | | Trade receivables | $ | 149 | | | $ | 4,030 | | | Insurance and warranty claim receivables | 1,323 | | | 1,985 | | | Federal and state tax receivables | 6,726 | | | 680 | | | Other industry related receivables | 727 | | | 690 | | | Allowance for expected credit losses | (4) | | | (5) | | | Receivables, net | $ | 8,921 | | | $ | 7,380 | |
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| Schedule of Net Unrealized Gains and Losses That Relate To Marketable Securities |
The calculation of net unrealized gains and losses that related to Marketable securities, Short-term restricted investments (SESP), and Long-term restricted investments (SESP) held as of September 30, 2025, and the calculation of net unrealized gains and losses that related to Marketable securities, Short-term restricted investments (SESP), and Long-term restricted investments (SESP) held as of September 30, 2025 was as follows: | | | | | | | | | | | | | Three Months Ended
September 30, 2025 | | Nine Months Ended
September 30, 2025 | | Unrealized gains recognized during the period on equity securities held as of the end of the period | $ | 736 | | | $ | 3,401 | | Plus: Net gains (losses) recognized during the period on equity securities sold during the period1 | — | | | — | | | Net gains recognized during the period on equity securities | $ | 736 | | | $ | 3,401 | |
The calculation of net unrealized gains and losses that relate to Marketable securities and Long-term restricted investments (SESP) held as of September 30, 2024 is as follows: | | | | | | | | | | | | | Three Months Ended
September 30, 2024 | | Nine Months Ended
September 30, 2024 | | Unrealized gains recognized during the period on equity securities held as of the end of the period | $ | 2,252 | | | $ | 3,154 | | Plus: Net gains (losses) recognized during the period on equity securities sold during the period2 | — | | | — | | | Net gains recognized during the period on equity securities | $ | 2,252 | | | $ | 3,154 | |
(1) (2)Although Marketable securities and Long-term restricted investments (SESP) were sold during the three and nine months ended September 30, 2025 and September 30, 2024, any gains or losses resulting from such sales are immaterial due to the nature of the securities held and the fact that the securities have been marked to market as of the end of the prior reporting period.
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| Schedule of Current and Non-Current Contract Liabilities |
The table below sets forth the opening and closing balances of both current and non-current net contract assets and liabilities. | | | | | | | | | | | | | Current | | Non-current | | Balance as of December 31, 2023 | $ | 100 | | | $ | 2,984 | | | Amounts received, excluding amounts recognized as revenue | 663 | | | 242 | | | Revenues recognized included in opening contract balance | (662) | | | (1,382) | | | Reclassification between current and non-current | 1,547 | | | (1,547) | | | Balance as of September 30, 2024 | $ | 1,648 | | | $ | 297 | | | | | | | Balance as of December 31, 2024 | $ | 4,190 | | | $ | — | | | Amounts received, excluding amounts recognized as revenue | 11,168 | | | — | | | Revenues recognized included in opening contract balance | (15,358) | | | — | | | Balance as of September 30, 2025 | $ | — | | | $ | — | |
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| Schedule of Original Cost of Company's Fixed Assets and Accumulated Depreciation |
The table below sets forth the original cost of the Company’s property and equipment and accumulated depreciation or amortization as of the dates presented. | | | | | | | | | | | | | | | | | | | | | | | | | September 30, 2025 | | December 31, 2024 | | Assets | Original
Cost | | Accumulated
Depreciation/
Amortization | | Original Cost | | Accumulated
Depreciation/
Amortization | | Aircraft | $ | 62,362 | | | $ | 54,670 | | | $ | 65,480 | | | $ | 55,544 | | | Spare engines | 152,487 | | | 134,822 | | | 157,997 | | | 135,278 | | | Rotable parts | 29,805 | | | 19,565 | | | 29,823 | | | 19,223 | | | Ground equipment | 2,952 | | | 2,597 | | | 2,953 | | | 2,466 | | | Office equipment | 4,782 | | | 4,615 | | | 4,782 | | | 4,547 | | | Leasehold improvements | 1,137 | | | 924 | | | 1,123 | | | 880 | | | Total | $ | 253,525 | | | $ | 217,193 | | | $ | 262,158 | | | $ | 217,938 | |
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| Schedule of Other Assets |
Other assets is made up of the items presented in the table below. | | | | | | | | | | September 30, 2025 | December 31, 2024 | Expected state tax refunds from 2021 and 2022 amended returns | $ | 248 | | $ | 253 | | | Expected federal refunds | — | | 6,527 | | | Workers compensation loss fund | 833 | | 804 | | | Long-term deposits | 56 | | 78 | | | Other assets | $ | 1,137 | | $ | 7,662 | |
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| Schedule of Classification of Marketable Securities And Long Term Investments |
The tables below set forth the Company’s classification of Marketable securities, Long-term investments and Long-term restricted investments (SESP) as of the dates presented: | | | | | | | | | | | | | | | | | | | | | | | | | September 30, 2025 | | Total | | Level 1 | | Level 2 | | Level 3 | | Marketable securities – exchange-traded funds | $ | 86,232 | | | $ | 86,232 | | | $ | — | | | $ | — | | | Long-term investments – bonds (see Note 4) | 4,275 | | | — | | | 4,275 | | | — | | | Short-term restricted investments (SESP) - mutual funds | $ | 2,808 | | | 2,808 | | | | | | | Long-term restricted investments (SESP) - mutual funds | 1,481 | | | 1,481 | | | — | | | — | | | Total | $ | 94,796 | | | $ | 90,521 | | | $ | 4,275 | | | $ | — | |
| | | | | | | | | | | | | | | | | | | | | | | | | December 31, 2024 | | Total | | Level 1 | | Level 2 | | Level 3 | | Marketable securities – exchange-traded funds | $ | 87,629 | | | $ | 87,629 | | | $ | — | | | $ | — | | | Marketable securities – mutual funds | 9,389 | | | 9,389 | | | — | | | — | | | Long-term investments – bonds (see Note 4) | 4,275 | | | — | | | 4,275 | | | — | | | Long-term restricted investments (SESP) - mutual funds | 3,797 | | | 3,797 | | | — | | | — | | | Total | $ | 105,090 | | | $ | 100,815 | | | $ | 4,275 | | | $ | — | |
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