XML 50 R43.htm IDEA: XBRL DOCUMENT v3.25.2
Long-Term Debt, Finance Leases, and Other Borrowings - Schedule of Long-term Debt (Detail) - USD ($)
$ in Thousands
Jun. 30, 2025
Sep. 30, 2024
Debt Instrument [Line Items]    
Gross long-term debt, including current maturities $ 113,744 $ 315,210
Less unamortized debt issuance costs   (2,395)
Less notes payable warrants (774) (2,544)
Net long-term debt, including current maturities 112,970 310,271
Less current portion, net of unamortized debt issuance costs (84,725) (50,455)
Net long-term debt 28,245 259,816
Revolving Credit Facility, Quarterly Interest Through 2028 [Member]    
Debt Instrument [Line Items]    
Gross long-term debt, including current maturities 33,018 37,520
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 Secured Parties, Due in Quarterly Installments Collateralized by the Underlying Aircraft Through 2028 [Member]    
Debt Instrument [Line Items]    
Gross long-term debt, including current maturities   73,884
Other Obligations Due to Financial Institutions, Monthly or Quarterly Collateralized by the Underlying Equipment, Due 2022 Through 2031 [Member]    
Debt Instrument [Line Items]    
Gross long-term debt, including current maturities   4,681
Notes Payable to the UST, Quarterly Through 2025 [Member]    
Debt Instrument [Line Items]    
Gross long-term debt, including current maturities $ 80,726 $ 113,656