Major Customers and Foreign Sales - Schedule of Revenues by Geographic Region (Details) - Net Revenues - Geographic Concentration Risk	9 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Revenue, Major Customer [Line Items]
Concentration risk, percentage	100.00%	100.00%
United States
Revenue, Major Customer [Line Items]
Concentration risk, percentage	27.00%	40.00%
Canada
Revenue, Major Customer [Line Items]
Concentration risk, percentage	1.00%	1.00%
Mexico
Revenue, Major Customer [Line Items]
Concentration risk, percentage	1.00%	1.00%
Other North America
Revenue, Major Customer [Line Items]
Concentration risk, percentage	2.00%	0.00%
Total Americas
Revenue, Major Customer [Line Items]
Concentration risk, percentage	31.00%	42.00%
China
Revenue, Major Customer [Line Items]
Concentration risk, percentage	18.00%	20.00%
Malaysia
Revenue, Major Customer [Line Items]
Concentration risk, percentage	8.00%	11.00%
Taiwan
Revenue, Major Customer [Line Items]
Concentration risk, percentage	21.00%	6.00%
Other Asia
Revenue, Major Customer [Line Items]
Concentration risk, percentage	6.00%	4.00%
Total Asia
Revenue, Major Customer [Line Items]
Concentration risk, percentage	53.00%	41.00%
Germany
Revenue, Major Customer [Line Items]
Concentration risk, percentage	2.00%	7.00%
Hungary
Revenue, Major Customer [Line Items]
Concentration risk, percentage	3.00%	0.00%
Czech Republic
Revenue, Major Customer [Line Items]
Concentration risk, percentage	2.00%	3.00%
Austria
Revenue, Major Customer [Line Items]
Concentration risk, percentage	0.00%	1.00%
Other Europe
Revenue, Major Customer [Line Items]
Concentration risk, percentage	9.00%	6.00%
Total Europe
Revenue, Major Customer [Line Items]
Concentration risk, percentage	16.00%	17.00%