Supplementary Balance Sheet Information - Summary of Inventory Reserves (Details) - Reserve, Inventory - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	$ 4,082	$ 3,681	$ 3,136
Provisions	3,324	1,752	1,522
Inventory disposals and adjustments	(2,415)	(1,351)	(977)
Balance at end of period	$ 4,991	$ 4,082	$ 3,681