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The 401(k) Benefit Plan (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Retirement Benefits [Abstract]
Amount contributed and recorded expense under the 401(k) Benefit Plan	$ 1.1	$ 0.9	$ 1.6

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- References

No definition available.

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- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

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No definition available.

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