Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current Assets
Cash and cash equivalents	$ 19,013	$ 37,170
Restricted cash	418	1,449
Marketable securities	130,517	138,370
Accounts receivable, net	33,272	7,422
Notes receivable	60,315	0
Spare parts and supplies, net	4,404	5,200
Contract costs	258	518
Prepaid expenses and other	2,776	4,174
Total Current Assets	250,973	194,303
Property and Equipment
Flight property and equipment	262,237	259,720
Ground property and equipment	7,895	8,252
Less accumulated depreciation and amortization	(163,336)	(143,313)
Net Property and Equipment	106,796	124,659
Other Assets
Operating lease right-of-use asset	14,789	18,679
Intangibles	5,300	5,300
Long-term deferred tax asset	616	533
Long-term investments	4,275	4,275
Long-term contract costs	0	96
Long-term notes receivable	0	47,568
Other	1,687	3,988
Total Other Assets	26,667	80,439
Total Assets	384,436	399,401
Current Liabilities
Accounts payable	16,593	20,060
Accrued payroll and employee benefits	13,057	14,885
Current portion of operating lease liability	5,078	5,150
Other accrued expenses	253	172
Contract liabilities	3,576	8,098
Deferred revenue	22,318	35,792
Income taxes payable	4,633	0
Current portion of long-term debt (stated principal amount of $7,000 at September 30, 2022 and $3,500 December 31, 2021)	9,224	5,880
Total Current Liabilities	74,732	90,037
Other Long-Term Liabilities
Long-term debt (stated principal amount of $52,100 at September 30, 2022 and $56,000 at December 31, 2021)	56,089	61,670
Long-term promissory note	4,275	4,275
Deferred tax liability	653	688
Long-term operating lease liability	7,100	10,877
Long-term contract liabilities	0	1,326
Deferred revenue, net of current portion	0	9,046
Other	2,757	2,722
Total Long-Term Liabilities	70,874	90,604
Total Liabilities	145,606	180,641
Commitments and Contingencies (Note 8)
Series C Convertible Redeemable Preferred Stock, $0.01 par value, 4,000,000 shares authorized, issued and outstanding at September 30, 2022 and December 31, 2021	13,200	13,200
Stockholders' Equity
Common Stock, $0.01 par value, 100,000,000 shares authorized, 55,481,140 shares issued at September 30, 2022 and December 31, 2021, 45,652,266 shares outstanding at September 30, 2022 and 53,316,299 shares outstanding at December 31, 2021	555	555
Additional paid-in capital	285,866	287,429
Retained deficit	(46,778)	(79,144)
Treasury stock	(14,013)	(3,280)
Total Stockholders' Equity	225,630	205,560
Total Liabilities and Stockholders' Equity	$ 384,436	$ 399,401