Balance Sheet Information (Tables)

6 Months Ended

Mar. 31, 2021

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Summary of Certain Significant Amounts Included in Condensed Consolidated Balance Sheet

Certain significant amounts included in the Company's condensed consolidated balance sheet as of March 31, 2021 and September 30, 2020, consisted of the following (in thousands):

	March 31,			September 30,
	2021			2020
Expendable parts and supplies, net:
Expendable parts and supplies	$	27,324		$	27,431
Less: obsolescence and other		(4,280	)		(4,460	)
	$	23,044		$	22,971

Prepaid expenses and other current assets:
Deferred offering and reimbursed costs	$	—		$	1,261
Other		8,956			14,806
	$	8,956		$	16,067
Property and equipment, net:
Aircraft and other flight equipment substantially pledged	$	1,603,377		$	1,596,174
Other equipment		5,189			5,147
Leasehold improvements		2,763			2,763
Vehicles		1,114			1,032
Building		699			699
Furniture and fixtures		303			302
Total property and equipment		1,613,445			1,606,117
Less: accumulated depreciation		(432,761	)		(393,702	)
	$	1,180,684		$	1,212,415
Other Assets:
Warrants	$	16,374		$	—
Other		4,273			—
	$	20,647		$	—
Other accrued expenses:
Accrued property taxes	$	5,996		$	11,354
Accrued interest		2,480			3,268
Accrued vacation		5,718			5,975
Other		14,416			24,881
	$	28,610		$	45,478