Income Taxes - Schedule of Components of (Loss) Income Before (Benefit) Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Income Tax Disclosure [Abstract]
Domestic	$ (17,271)	$ 15,275	$ (3,320)
Foreign	2,089	3,510	6,754
(Loss) income before income taxes	$ (15,182)	$ 18,785	$ 3,434