Retirement Plan (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Retirement Plan [Abstract]
Minimum age of employee for 401(k) retirement plan	21 years
Matching contributions percentage	50.00%
Percentage of employee salary deferrals	4.00%
Discretionary contributions by employer	$ 2.2	$ 1.5	$ 0.8