Note 11 - Stock-based Compensation (Tables)

9 Months Ended

Jun. 30, 2024

Notes Tables

Share-Based Payment Arrangement, Cost by Plan [Table Text Block]

	Three Months Ended June 30,				Nine Months Ended June 30,
	2024		2023		2024		2023
Restricted stock units	$	3,508	$	3,604	$	11,642	$	8,997
Employee stock purchase plan		310		391		980		1,094
Total stock-based compensation expense	$	3,818	$	3,995	$	12,622	$	10,091

Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]

				Weighted
				Average
				Grant-Date
	Shares			Fair Value
Outstanding as of September 30, 2023		718,954		$	67.40
Granted		610,574		$	55.68
Vested		(181,639	)	$	68.32
Forfeited		(322,588	)	$	63.07
Outstanding as of June 30, 2024		825,301		$	60.22

	Nine Months Ended June 30,
	2024		2023
Time-based restricted stock units		220,641		311,609
Performance-based restricted stock units		389,933		278,457
Total units		610,574		590,066