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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Jun. 30, 2025
Sep. 30, 2024
Sep. 30, 2023
Current assets:      
Cash and cash equivalents $ 42,472 $ 15,621 $ 32,940
Restricted cash 3,048 3,009 3,132
Receivables, net 8,724 5,263 8,253
Expendable parts and supplies, net 16,172 28,272 29,245
Assets held for sale 60,311 5,741 57,722
Prepaid expenses and other current assets 2,714 3,371 7,294
Total current assets 133,441 61,277 138,586
Property and equipment, net 31,850 426,351 698,022
Lease and equipment deposits 637 1,289 1,630
Operating lease right-of-use assets 7,255 7,231 9,709
Deferred heavy maintenance, net 0 6,396 7,974
Assets held for sale 0 86,605 12,000
Other assets 5,466 7,709 30,546
Total assets 178,649 596,858 898,467
Current liabilities:      
Current portion of long-term debt and finance leases 84,725 50,455 163,550
Current portion of deferred revenue 5,532 3,932 4,880
Current maturities of operating leases 1,693 1,681 3,510
Accounts payable 50,132 72,096 58,957
Accrued compensation 9,294 12,797 10,008
Customer deposits 226 1,189 0
Other accrued expenses 23,015 32,308 27,001
Total current liabilities 174,617 174,458 267,906
Noncurrent liabilities:      
Long-term debt and finance leases, excluding current portion 28,245 259,816 364,728
Noncurrent operating lease liabilities 6,872 6,863 8,077
Deferred credits from related party 0 3,020 4,617
Deferred income taxes 575 8,173 8,414
Deferred revenue, net of current portion 7,787 5,707 16,167
Other noncurrent liabilities 1,837 28,579 28,522
Total noncurrent liabilities 45,316 312,158 430,525
Total liabilities 219,933 486,616 698,431
Commitments and contingencies
Stockholders' equity:      
Common stock of no par value and additional paid-in capital 273,183 272,376 271,155
Accumulated deficit (314,467) (162,134) (71,119)
Total stockholders' equity (41,284) 110,242 200,036
Total liabilities and stockholders' equity $ 178,649 $ 596,858 $ 898,467