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Long-Term Debt, Finance Leases, and Other Borrowings - Schedule of Long-term Debt (Detail) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Debt Instrument [Line Items]    
Gross long-term debt, including current maturities $ 95,215 $ 230,608
Less unamortized debt issuance costs   (1,433)
Less notes payable warrants (194) (2,114)
Net long-term debt, including current maturities 95,021 227,061
Less current portion, net of unamortized debt issuance costs (68,009) (143,275)
Net long-term debt 27,012 83,786
Revolving Credit Facility, Quarterly Interest Through 2028 [Member]    
Debt Instrument [Line Items]    
Gross long-term debt, including current maturities 33,018 33,018
Notes Payable to Secured Parties, Due in Semi Annual Installments Collateralized by the Underlying Aircraft Through 2028 [Member]    
Debt Instrument [Line Items]    
Gross long-term debt, including current maturities   85,469
Notes Payable to the UST, Quarterly Through 2025 [Member]    
Debt Instrument [Line Items]    
Gross long-term debt, including current maturities $ 62,197 $ 112,121