Stock-Based Compensation and Equity Grants - Stock Options Outstanding, Vested and Unvested (Details) - shares shares in Thousands	Mar. 31, 2024	Sep. 30, 2023
Share-Based Payment Arrangement [Abstract]
Vested and exercisable (in shares)	1,458	1,608
Unvested (in shares)	260	670
Option outstanding (in shares)	1,718	2,278

Number of fully vested and expected to vest exercisable options that may be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (e)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant