Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2024	Sep. 30, 2023
Current assets:
Cash and cash equivalents	$ 18,529	$ 32,940
Restricted cash	2,984	3,132
Receivables, net ($1,026 and $4,016 from related party)	4,650	8,253
Expendable parts and supplies, net	29,474	29,245
Assets held for sale	38,250	57,722
Prepaid expenses and other current assets	4,550	7,294
Total current assets	98,437	138,586
Property and equipment, net	529,479	698,022
Lease and equipment deposits	1,289	1,630
Operating lease right-of-use assets	8,074	9,709
Deferred heavy maintenance, net	6,466	7,974
Assets held for sale	41,970	12,000
Other assets	20,558	30,546
Total assets	706,273	898,467
Current liabilities:
Current portion of long-term debt and finance leases ($2,376 and $20,500 from related party)	94,373	163,550
Current portion of deferred revenue	2,809	4,880
Current maturities of operating leases	2,334	3,510
Accounts payable	57,347	58,957
Accrued compensation	13,415	10,008
Other accrued expenses	26,525	27,001
Total current liabilities	196,803	267,906
Noncurrent liabilities:
Long-term debt and finance leases, excluding current portion ($35,642 and $30,630 from related party)	299,040	364,728
Noncurrent operating lease liabilities	7,309	8,077
Deferred credits from related party	3,720	4,617
Deferred income taxes	8,907	8,414
Deferred revenue, net of current portion	7,347	16,167
Other noncurrent liabilities	28,475	28,522
Total noncurrent liabilities	354,798	430,525
Total liabilities	551,601	698,431
Commitments and contingencies (Note 15)
Stockholders' equity:
Common stock of no par value and additional paid-in capital, 125,000,000 shares authorized; 41,172,218 (2024) and 40,940,326 (2023) shares issued and outstanding, 4,899,497 (2024) and 4,899,497 (2023) warrants issued and outstanding	271,981	271,155
Accumulated deficit	(117,309)	(71,119)
Total stockholders' equity	154,672	200,036
Total liabilities and stockholders' equity	$ 706,273	$ 898,467