Geographic Regions (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	$ 113,315	$ 106,298	$ 85,205
Operating income (loss)	(14,970)	17,286	3,725
Net long-lived assets	9,695	6,552
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	84,549	89,197	58,937
Operating income (loss)	(17,874)	14,163	(4,174)
Net long-lived assets	8,396	4,981
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	24,969	13,854	22,828
Operating income (loss)	714	2,003	6,958
Net long-lived assets	1,262	1,571
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	3,797	3,247	3,440
Operating income (loss)	2,190	$ 1,120	$ 941
Net long-lived assets	$ 37