Restructuring - Restructuring Reserve (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Restructuring Reserve [Roll Forward]
Balance at beginning of period	$ 462	$ 304
Provisions	4,577	712
Payments	(4,028)	(554)
Balance at end of period	$ 1,011	$ 462