Geographic Regions (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
Operating (loss) income	(6,729)	(14,970)	17,286
Net long-lived assets	11,647	9,695
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	73,340	84,549	89,197
Operating (loss) income	(9,111)	(17,874)	14,163
Net long-lived assets	10,572	8,396
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	24,048	24,969	13,854
Operating (loss) income	1,836	714	2,003
Net long-lived assets	1,005	1,262
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	3,826	3,797	3,247
Operating (loss) income	546	2,190	$ 1,120
Net long-lived assets	$ 70	$ 37