Stock-Based Compensation (Tables)

6 Months Ended

Mar. 31, 2024

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of stock-based compensation expense

	Three Months Ended March 31,				Six Months Ended March 31,
	2024		2023		2024		2023
Restricted stock units	$	5,284	$	3,634	$	8,134	$	5,393
Employee stock purchase plan		318		356		670		703
Total stock-based compensation expense	$	5,602	$	3,990	$	8,804	$	6,096

Summary of restricted stock unit activity

		Weighted
		Average
		Grant-Date
	Shares	Fair Value
Outstanding as of September 30, 2023	718,954	$	67.40
Granted	608,706	$	55.69
Vested	(174,868)	$	68.95
Forfeited	(298,806)	$	63.75
Outstanding as of March 31, 2024	853,986	$	60.01

	Six Months Ended March 31,
	2024	2023
Time-based restricted stock units	220,174	356,410
Performance-based restricted stock units	388,532	215,701
Total units	608,706	572,111