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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Mar. 31, 2019
Sep. 30, 2018
Current assets:    
Cash and cash equivalents $ 77,743 $ 103,311
Marketable securities   19,921
Restricted cash 3,646 3,823
Receivables, net 12,071 14,290
Expendable parts and supplies, net 19,229 15,658
Prepaid expenses and other current assets 47,451 40,914
Total current assets 160,140 197,917
Property and equipment, net 1,237,615 1,250,829
Intangibles, net 10,437 11,341
Lease and equipment deposits 6,916 2,598
Other assets 10,178 9,703
Total assets 1,425,286 1,472,388
Current liabilities:    
Current portion of long-term debt and capital leases 147,114 155,170
Accounts payable ($2,573 and $1,330 to related party) 40,527 54,307
Accrued compensation 11,675 12,208
Other accrued expenses 27,344 29,696
Total current liabilities 226,660 251,381
Noncurrent liabilities:    
Long-term debt and capital leases, excluding current portion 696,856 760,177
Deferred credits ($6,829 and $7,702 to related party) 14,680 15,393
Deferred income taxes 49,836 39,797
Other noncurrent liabilities 27,969 31,173
Total noncurrent liabilities 789,341 846,540
Total liabilities 1,016,001 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; 27,969,475 (2019) and 23,902,903 (2018) shares issued and outstanding, 6,780,297 (2019) and 10,614,990 (2018) warrants issued and outstanding 237,171 234,683
Retained earnings 172,114 139,784
Total stockholders' equity 409,285 374,467
Total liabilities and stockholders' equity $ 1,425,286 $ 1,472,388