Balance Sheet Information (Tables)

12 Months Ended

Sep. 30, 2021

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Summary of Certain Significant Amounts Included in Consolidated Balance Sheet

Certain significant amounts included in the Company's consolidated balance sheet as of September 30, 2021 and 2020, consisted of the following (in thousands):

	September 30,			September 30,
	2021			2020
Expendable parts and supplies, net:
Expendable parts and supplies	$	29,297		$	27,431
Less: obsolescence and other		(4,830	)		(4,460	)
	$	24,467		$	22,971
Prepaid expenses and other current assets:
Deferred offering and reimbursed costs	$	—		$	1,261
Prepaid aviation insurance		2,171			2,396
Other		4,714			12,410
	$	6,885		$	16,067
Property and equipment, net:
Aircraft and other flight equipment substantially pledged	$	1,611,544		$	1,596,174
Other equipment		4,934			5,147
Leasehold improvements		2,776			2,763
Vehicles		1,184			1,032
Building		699			699
Furniture and fixtures		300			302
Total property and equipment		1,621,437			1,606,117
Less: accumulated depreciation		(469,546	)		(393,702	)
	$	1,151,891		$	1,212,415
Other assets:
Investments in equity securities	$	25,149		$	—
Lease incentives		10,957			—
Other		15			742
	$	36,121		$	742
Other accrued expenses:
Accrued property taxes	$	8,783		$	11,354
Accrued interest		2,565			3,268
Accrued vacation		5,936			5,975
Deferred PSP payments		—			11,311
Other		16,373			13,570
	$	33,657		$	45,478
Other noncurrent liabilities:
Warrant liabilities	$	21,964		$	—
Lease incentive obligations		6,358			—
Other		6,269			1,409
	$	34,591		$	1,409