Major Customers and Sales by Country - Schedule of Percentage of Net Revenues by Geographic Region (Details) - Net Revenues - Geographic Concentration Risk	12 Months Ended
	Sep. 30, 2025	Sep. 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%	39.00%
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 Americas
Revenue, Major Customer [Line Items]
Concentration risk, percentage	1.00%
Total Americas
Revenue, Major Customer [Line Items]
Concentration risk, percentage	30.00%	41.00%
China
Revenue, Major Customer [Line Items]
Concentration risk, percentage	22.00%	20.00%
Malaysia
Revenue, Major Customer [Line Items]
Concentration risk, percentage	7.00%	12.00%
Taiwan
Revenue, Major Customer [Line Items]
Concentration risk, percentage	19.00%	8.00%
Singapore
Revenue, Major Customer [Line Items]
Concentration risk, percentage	2.00%	1.00%
Other Asia
Revenue, Major Customer [Line Items]
Concentration risk, percentage	5.00%	2.00%
Total Asia
Revenue, Major Customer [Line Items]
Concentration risk, percentage	55.00%	43.00%
Czech Republic
Revenue, Major Customer [Line Items]
Concentration risk, percentage	2.00%	3.00%
United Kingdom
Revenue, Major Customer [Line Items]
Concentration risk, percentage	2.00%	1.00%
Hungary
Revenue, Major Customer [Line Items]
Concentration risk, percentage	2.00%
Austria
Revenue, Major Customer [Line Items]
Concentration risk, percentage		1.00%
Germany
Revenue, Major Customer [Line Items]
Concentration risk, percentage	2.00%	6.00%
Other Europe
Revenue, Major Customer [Line Items]
Concentration risk, percentage	7.00%	5.00%
Total Europe
Revenue, Major Customer [Line Items]
Concentration risk, percentage	15.00%	16.00%