Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Cash Flows from Operating Activities
Net loss	$ (19,655)	$ (21,052)
Adjustments to reconcile net loss to net cash provided by/(used in) operating activities:
Depreciation, amortization and obsolescence allowance	19,114	19,125
Amortization of engine overhauls	2,728	2,485
Deferred income taxes	(447)	(3,862)
(Gain) loss on disposition of property and equipment	(519)	219
(Gain) loss on marketable securities	(2,629)	10
Gain on extinguishment of debt	0	(70)
Changes in operating assets and liabilities:
Receivables, net	1,735	1,636
Sales lease receivable	285	0
Spare parts and supplies	(1,184)	(450)
Prepaid expenses and other	(157)	916
Operating lease right-of-use asset	141	140
Accounts payable	5,247	(5,230)
Accrued payroll and employee benefits	233	246
Other accrued expenses	101	29
Contract liabilities	(1,139)	(811)
Deferred revenues	0	(11,601)
Other long-term liabilities	(15)	(222)
Net Cash Provided by/(Used in) Operating Activities	3,839	(18,492)
Cash Flows from Investing Activities
Additions to property and equipment	(2,863)	(3,017)
Proceeds on disposition of property and equipment	631	19
Purchase of marketable securities and long-term restricted investments (SESP)	(2,053)	(2,745)
Sale of marketable securities and long-term restricted investments (SESP)	120	20,000
Net Cash (Used in)/Provided by Investing Activities	(4,165)	14,257
Cash Flows from Financing Activities
Repayment of long-term debt	0	(8,598)
Dividends paid on preferred stock	(985)	(915)
Series C stock redemption	(10,710)	0
Repurchased stock	(2,016)	(3,888)
Net Cash Used in Financing Activities	(13,711)	(13,401)
Decrease in Cash, Cash Equivalents and Restricted Cash	(14,037)	(17,636)
Cash, Cash Equivalents and Restricted Cash, beginning of period	21,531	34,182
Cash, Cash Equivalents and Restricted Cash, end of period	$ 7,494	$ 16,546