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Consolidated Balance Sheets - USD ($)
$ in Thousands
Sep. 30, 2022
Sep. 30, 2021
Current assets:    
Cash and cash equivalents $ 57,683 $ 120,517
Restricted cash 3,342 3,350
Receivables, net 3,978 3,167
Expendable parts and supplies, net 26,715 24,467
Prepaid expenses and other current assets 6,616 6,885
Total current assets 98,334 158,386
Property and equipment, net 865,254 1,151,891
Intangible assets, net 3,842 6,792
Lease and equipment deposits 6,085 6,808
Operating lease right-of-use assets 43,090 93,100
Deferred heavy maintenance, net 9,707 3,499
Assets held for sale 73,000  
Other assets 16,290 36,121
Total assets 1,115,602 1,456,597
Current liabilities:    
Current portion of long-term debt and finance leases 97,218 111,710
Current portion of deferred revenue 385 6,298
Current maturities of operating leases 17,233 32,652
Accounts payable 59,386 61,476
Accrued compensation 11,255 12,399
Other accrued expenses 29,000 33,657
Total current liabilities 214,477 258,192
Long-term debt and finance leases, excluding current portion 502,517 539,700
Noncurrent operating lease liabilities 16,732 33,991
Deferred credits 3,082 3,934
Deferred income taxes 17,719 69,940
Deferred revenue, net of current portion 23,682 28,202
Other noncurrent liabilities 29,219 34,591
Total noncurrent liabilities 592,951 710,358
Total liabilities 807,428 968,550
Commitments and contingencies (Note 17)
Stockholders' equity:    
Common stock of no par value and additional paid-in capital, 125,000,000 shares authorized; 36,376,897 (2022) and 35,958,759 (2021) shares issued and outstanding, and 4,899,497 (2022) and 4,899,497 (2021) warrants issued and outstanding 259,177 256,372
Retained earnings 48,997 231,675
Total stockholders' equity 308,174 488,047
Total liabilities and stockholders' equity $ 1,115,602 $ 1,456,597