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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Mar. 31, 2025
Sep. 30, 2024
Sep. 30, 2023
Current assets:      
Cash and cash equivalents $ 54,116 $ 15,621 $ 32,940
Restricted cash 3,043 3,009 3,132
Receivables, net 14,674 5,263 8,253
Expendable parts and supplies, net 13,649 28,272 29,245
Assets held for sale 75,812 5,741 57,722
Prepaid expenses and other current assets 2,283 3,371 7,294
Total current assets 163,577 61,277 138,586
Property and equipment, net 36,846 426,351 698,022
Lease and equipment deposits 583 1,289 1,630
Operating lease right-of-use assets 7,050 7,231 9,709
Deferred heavy maintenance, net   6,396 7,974
Assets held for sale   86,605 12,000
Other assets 6,896 7,709 30,546
Total assets 214,952 596,858 898,467
Current liabilities:      
Current portion of long-term debt and finance leases 98,603 50,455 163,550
Current portion of deferred revenue 5,381 3,932 4,880
Current maturities of operating leases 1,535 1,681 3,510
Accounts payable 55,972 72,096 58,957
Accrued compensation 11,498 12,797 10,008
Customer deposits 849 1,189 0
Other accrued expenses 28,199 32,308 27,001
Total current liabilities 202,037 174,458 267,906
Noncurrent liabilities:      
Long-term debt and finance leases, excluding current portion 31,652 259,816 364,728
Noncurrent operating lease liabilities 6,890 6,863 8,077
Deferred credits from related party   3,020 4,617
Deferred income taxes 596 8,173 8,414
Deferred revenue, net of current portion 9,209 5,707 16,167
Other noncurrent liabilities 26,973 28,579 28,522
Total noncurrent liabilities 75,320 312,158 430,525
Total liabilities 277,357 486,616 698,431
Commitments and contingencies
Stockholders' equity:      
Common stock of no par value and additional paid-in capital 272,918 272,376 271,155
Accumulated deficit (335,323) (162,134) (71,119)
Total stockholders' equity (62,405) 110,242 200,036
Total liabilities and stockholders' equity $ 214,952 $ 596,858 $ 898,467