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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Mar. 31, 2021
Sep. 30, 2020
Current assets:    
Cash and cash equivalents $ 147,867 $ 99,395
Restricted cash 3,351 3,446
Receivables, net 13,867 13,712
Expendable parts and supplies, net 23,044 22,971
Prepaid expenses and other current assets 8,956 16,067
Total current assets 197,085 155,591
Property and equipment, net 1,180,684 1,212,415
Intangibles, net 7,412 8,032
Lease and equipment deposits 8,242 1,899
Operating lease right-of-use assets 105,521 123,251
Other assets 20,647 742
Total assets 1,519,591 1,501,930
Current liabilities:    
Current portion of long-term debt and financing leases 103,980 189,268
Current portion of deferred revenue 4,356 9,389
Current maturities of operating leases 44,016 43,932
Accounts payable 70,012 53,229
Accrued compensation 10,449 12,030
Other accrued expenses 28,610 45,478
Total current liabilities 261,423 353,326
Noncurrent liabilities:    
Long-term debt and financing leases, excluding current portion 600,058 542,456
Noncurrent operating lease liabilities 38,405 62,531
Deferred credits 7,442 5,705
Deferred income taxes 70,929 64,275
Deferred revenue, net of current portion 29,502 14,369
Other noncurrent liabilities 20,988 1,409
Total noncurrent liabilities 767,324 690,745
Total liabilities 1,028,747 1,044,071
Commitments and contingencies (Note 14)
Stockholders' equity:    
Preferred stock of no par value, 5,000,000 shares authorized; no shares issued and outstanding
Common stock of no par value and additional paid-in capital, 125,000,000 shares authorized; 35,700,161 (2021) and 35,526,918 (2020) shares issued and outstanding, 4,899,497 (2021) and 0 (2020) warrants issued and outstanding 255,950 242,772
Retained earnings 234,894 215,087
Total stockholders' equity 490,844 457,859
Total liabilities and stockholders' equity $ 1,519,591 $ 1,501,930