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Major Customers and Foreign Sales - Schedule of Revenues by Geographic Region (Details) - Net Revenues - Geographic Concentration Risk | 9 Months Ended
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Jun. 30, 2026 | Jun. 30, 2025
Revenue, Major Customer [Line Items] |  |
Concentration risk, percentage | 100.00% | 100.00%
United States |  |
Revenue, Major Customer [Line Items] |  |
Concentration risk, percentage | 29.00% | 27.00%
Canada |  |
Revenue, Major Customer [Line Items] |  |
Concentration risk, percentage | 2.00% | 1.00%
Mexico |  |
Revenue, Major Customer [Line Items] |  |
Concentration risk, percentage | 2.00% | 1.00%
Other Americas |  |
Revenue, Major Customer [Line Items] |  |
Concentration risk, percentage | 1.00% | 2.00%
Total Americas |  |
Revenue, Major Customer [Line Items] |  |
Concentration risk, percentage | 34.00% | 31.00%
China |  |
Revenue, Major Customer [Line Items] |  |
Concentration risk, percentage | 21.00% | 18.00%
Malaysia |  |
Revenue, Major Customer [Line Items] |  |
Concentration risk, percentage | 7.00% | 8.00%
Taiwan |  |
Revenue, Major Customer [Line Items] |  |
Concentration risk, percentage | 16.00% | 21.00%
Other Asia |  |
Revenue, Major Customer [Line Items] |  |
Concentration risk, percentage | 11.00% | 6.00%
Total Asia |  |
Revenue, Major Customer [Line Items] |  |
Concentration risk, percentage | 55.00% | 53.00%
Germany |  |
Revenue, Major Customer [Line Items] |  |
Concentration risk, percentage | 1.00% | 2.00%
Hungary |  |
Revenue, Major Customer [Line Items] |  |
Concentration risk, percentage |  | 3.00%
Czech Republic |  |
Revenue, Major Customer [Line Items] |  |
Concentration risk, percentage | 1.00% | 2.00%
Other Europe |  |
Revenue, Major Customer [Line Items] |  |
Concentration risk, percentage | 9.00% | 9.00%
Total Europe |  |
Revenue, Major Customer [Line Items] |  |
Concentration risk, percentage | 11.00% | 16.00%

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