Balance Sheet Information (Tables)

12 Months Ended

Sep. 30, 2020

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 consolidated balance sheet as of September 30, 2020 and 2019, consisted of the following (in thousands):

	September 30,			September 30,
	2020			2019
Expendable parts and supplies, net
Expendable parts and supplies	$	27,431		$	25,336
Less obsolescence and other		(4,460	)		(3,999	)
	$	22,971		$	21,337
Prepaid expenses and other current assets
Prepaid aircraft rent	$	—		$	35,786
Deferred offering and reimbursed costs		1,261			2,092
Other		14,806			3,045
	$	16,067		$	40,923
Property and equipment—net
Aircraft and other flight equipment substantially pledged	$	1,596,174		$	1,582,199
Other equipment		5,147			5,122
Leasehold improvements		2,763			2,797
Vehicles		1,032			924
Building		699			699
Furniture and fixtures		302			302
Total property and equipment		1,606,117			1,592,043
Less accumulated depreciation		(393,702	)		(318,458	)
	$	1,212,415		$	1,273,585
Other accrued expenses
Accrued property taxes	$	11,354		$	9,186
Accrued interest		3,268			4,497
Accrued vacation		5,975			6,128
Deferred revenue- current portion		9,389			1,513
Other		24,881			7,564
	$	54,867		$	28,888