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Balance Sheet Information (Tables) | 9 Months Ended
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Sep. 30, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Summary of Certain Significant Amounts Included in Condensed Consolidated Balance Sheet | Certain significant amounts included in the condensed consolidated balance sheets consisted of the following (in thousands):
|  | September 30, |  |  | December 31, |
|  | 2025 |  |  | 2024 |
Expendable parts and supplies, net: |  |  |  |  |  |
Expendable parts and supplies |  | $ | 24,004 |  |  | $ | 39,404 |
Less: expendable parts warranty |  |  | (4,145 | ) |  |  | (5,574 | )
Less: obsolescence |  |  | (3,230 | ) |  |  | (4,658 | )
|  | $ | 16,629 |  |  | $ | 29,172 |
Property and equipment, net: |  |  |  |  |  |
Aircraft and other flight equipment |  | $ | 50,355 |  |  | $ | 319,831 |
Other equipment |  |  | 9,529 |  |  |  | 9,788 |
Total property and equipment |  |  | 59,884 |  |  |  | 329,619 |
Less: accumulated depreciation |  |  | (28,385 | ) |  |  | (126,052 | )
|  | $ | 31,499 |  |  | $ | 203,567 |
Other assets: |  |  |  |  |  |
Investments in equity securities |  | $ | 300 |  |  | $ | 300 |
Contract asset |  |  | 3,942 |  |  |  | 5,400 |
Other |  |  | 860 |  |  |  | 1,129 |
|  | $ | 5,102 |  |  | $ | 6,829 |
Other accrued expenses: |  |  |  |  |  |
Accrued property taxes |  | $ | 2,815 |  |  | $ | 4,722 |
Accrued interest |  |  | 981 |  |  |  | 3,207 |
Accrued vacation |  |  | 6,123 |  |  |  | 7,308 |
Accrued lodging |  |  | 3,287 |  |  |  | 3,847 |
Accrued simulator costs |  |  | 659 |  |  |  | 543 |
Accrued maintenance |  |  | 1,830 |  |  |  | 1,911 |
Accrued employee benefits |  |  | 1,132 |  |  |  | 1,528 |
Accrued fleet operating expense |  |  | 598 |  |  |  | 3,118 |
Customer deposits |  |  | 224 |  |  |  | 962 |
Other |  |  | 9,041 |  |  |  | 8,298 |
|  | $ | 26,690 |  |  | $ | 35,444 |
Other noncurrent liabilities: |  |  |  |  |  |
Warrant liabilities |  | $ | 100 |  |  | $ | 25,225 |
Long-term employee benefits |  |  | 1,759 |  |  |  | 537 |
Other |  |  | — |  |  |  | 913 |
|  | $ | 1,859 |  |  | $ | 26,675 |

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- Definition Tabular disclosure of condensed balance sheet, including, but not limited to, balance sheets of consolidated entities and consolidation eliminations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 04 -Paragraph a -Publisher SEC Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 942 -SubTopic 235 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477314/942-235-S99-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-4 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3 + Details
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