Fair Value Measurements - Additional Information (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Apr. 30, 2019	Sep. 30, 2024	Sep. 30, 2022	Sep. 30, 2019
Promissory note receivable due April 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of notes receivable	$ 1.1			$ 1.1
Interest on note receivable	2.89%
Promissory note receivable from Founders
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of notes receivable			$ 15.0
Interest on note receivable		15.00%