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Description of Business - Narrative (Details) - $ / shares	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Jun. 05, 2020
Access Industries
Subsidiary, Sale of Stock [Line Items]
Sale of stock, percentage of ownership after transaction (as a percent)	98.00%
Sale of stock, percentage of economic interest (as a percent)	73.00%
Class A Common Stock
Subsidiary, Sale of Stock [Line Items]
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Class A Common Stock | IPO
Subsidiary, Sale of Stock [Line Items]
Common stock, par value (in dollars per share)			$ 0.001
Common Class B
Subsidiary, Sale of Stock [Line Items]
Common stock, par value (in dollars per share)	0.001	$ 0.001
Common Class B | Access Industries
Subsidiary, Sale of Stock [Line Items]
Common stock, par value (in dollars per share)	$ 0.001

X

- Definition

Face amount or stated value per share of common stock.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

+ Details

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- Definition

Percentage of subsidiary's or equity investee's stock owned by parent company after stock transaction.

+ References

No definition available.

+ Details

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- Definition

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+ References

No definition available.

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- Definition

Sale Of Stock, Percentage Of Economic Interest

+ References

No definition available.

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