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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Dec. 31, 2018
Sep. 30, 2018
Current assets:    
Cash and cash equivalents $ 88,600 $ 103,311
Marketable securities 14,974 19,921
Restricted cash 3,644 3,823
Receivables, net 6,015 14,290
Expendable parts and supplies, net 17,402 15,658
Prepaid expenses and other current assets 43,018 40,914
Total current assets 173,653 197,917
Property and equipment, net 1,247,784 1,250,829
Intangibles, net 10,889 11,341
Lease and equipment deposits 1,838 2,598
Other assets 9,798 9,703
Total assets 1,443,962 1,472,388
Current liabilities:    
Current portion of long-term debt and capital leases 149,842 155,170
Accounts payable ($2,046 and $1,330 to related party) 40,439 54,307
Accrued compensation 9,920 12,208
Other accrued expenses 31,017 29,696
Total current liabilities 231,218 251,381
Noncurrent liabilities:    
Long-term debt and capital leases, excluding current portion 727,839 760,177
Deferred credits ($7,366 and $7,702 to related party) 14,412 15,393
Deferred income taxes 45,750 39,797
Other noncurrent liabilities 29,584 31,173
Total noncurrent liabilities 817,585 846,540
Total liabilities 1,048,803 1,097,921
Commitments and contingencies (Note 13 and 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; 23,902,903 shares issued and outstanding, 10,614,990 warrants issued and outstanding 236,294 234,683
Retained earnings 158,865 139,784
Total stockholders' equity 395,159 374,467
Total liabilities and stockholders' equity $ 1,443,962 $ 1,472,388