Geographic Regions (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	$ 79,364	$ 101,214
Operating (loss) income	(28,488)	(6,729)
Net long-lived assets	10,227	11,647
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	45,191	73,340
Operating (loss) income	(32,971)	(9,111)
Net long-lived assets	9,554	10,572
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	30,823	24,048
Operating (loss) income	4,084	1,836
Net long-lived assets	613	1,005
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	3,350	3,826
Operating (loss) income	399	546
Net long-lived assets	$ 60	$ 70