The cumulative amount of the reporting entity's undistributed earnings or deficit.

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Name:	us-gaap_RetainedEarningsAccumulatedDeficit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

New Accounting Pronouncements and Changes in Accounting (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Sep. 30, 2021	Oct. 01, 2020
New Accounting Pronouncements and Changes in Accounting
Accumulated deficits	$ 706,783	$ 504,126
ASU 2016-06
New Accounting Pronouncements and Changes in Accounting
Accumulated deficits			$ 8,000