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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Dec. 31, 2020
Sep. 30, 2020
Current assets:    
Cash and cash equivalents $ 181,300 $ 99,395
Restricted cash 3,634 3,446
Receivables, net 15,412 13,712
Expendable parts and supplies, net 22,760 22,971
Prepaid expenses and other current assets 12,897 16,067
Total current assets 236,003 155,591
Property and equipment, net 1,194,061 1,212,415
Intangibles, net 7,722 8,032
Lease and equipment deposits 1,851 1,899
Operating lease right-of-use assets 114,666 123,251
Other assets 514 742
Total assets 1,554,817 1,501,930
Current liabilities:    
Current portion of long-term debt and financing leases 99,745 189,268
Current portion of deferred revenue 51,253 9,389
Current maturities of operating leases 44,712 43,932
Accounts payable 47,576 53,229
Accrued compensation 7,029 12,030
Other accrued expenses 37,581 45,478
Total current liabilities 287,896 353,326
Noncurrent liabilities:    
Long-term debt and financing leases, excluding current portion 624,116 542,456
Noncurrent operating lease liabilities 53,570 62,531
Deferred credits 5,176 5,705
Deferred income taxes 69,111 64,275
Deferred revenue, net of current portion 26,504 14,369
Other noncurrent liabilities 4,147 1,409
Total noncurrent liabilities 782,624 690,745
Total liabilities 1,070,520 1,044,071
Commitments and contingencies (Note 14 and Note 15)
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; 35,532,162 (2021) and 35,526,918 (2020) shares issued and outstanding, 4,899,497 (2021) and 0 (2020) warrants issued and outstanding 255,092 242,772
Retained earnings 229,205 215,087
Total stockholders' equity 484,297 457,859
Total liabilities and stockholders' equity $ 1,554,817 $ 1,501,930