Geographic Regions (Parenthetical) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	$ 101,214	$ 113,315	$ 106,298
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	73,340	84,549	89,197
United States | China Facility
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	$ 14,700	$ 17,000	$ 22,700