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Major Customers and Sales by Country - Schedule of Revenues by Geographic Region (Details) - Net Revenues - Geographic Concentration Risk | 12 Months Ended
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Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2021
Revenue, Major Customer [Line Items] |  |  |
Concentration risk, percentage | 100.00% | 100.00% | 100.00%
United States |  |  |
Revenue, Major Customer [Line Items] |  |  |
Concentration risk, percentage | 39.00% | 27.00% | 22.00%
Other Americas |  |  |
Revenue, Major Customer [Line Items] |  |  |
Concentration risk, percentage | 9.00% | 9.00% | 5.00%
Total Americas |  |  |
Revenue, Major Customer [Line Items] |  |  |
Concentration risk, percentage | 48.00% | 36.00% | 27.00%
China |  |  |
Revenue, Major Customer [Line Items] |  |  |
Concentration risk, percentage | 14.00% | 17.00% | 29.00%
Malaysia |  |  |
Revenue, Major Customer [Line Items] |  |  |
Concentration risk, percentage | 6.00% | 7.00% | 3.00%
Taiwan |  |  |
Revenue, Major Customer [Line Items] |  |  |
Concentration risk, percentage | 5.00% | 14.00% | 15.00%
Other Asia |  |  |
Revenue, Major Customer [Line Items] |  |  |
Concentration risk, percentage | 6.00% | 6.00% | 11.00%
Total Asia |  |  |
Revenue, Major Customer [Line Items] |  |  |
Concentration risk, percentage | 31.00% | 44.00% | 58.00%
Czech Republic |  |  |
Revenue, Major Customer [Line Items] |  |  |
Concentration risk, percentage | 5.00% |  |
Austria |  |  |
Revenue, Major Customer [Line Items] |  |  |
Concentration risk, percentage | 4.00% | 10.00% | 3.00%
Germany |  |  |
Revenue, Major Customer [Line Items] |  |  |
Concentration risk, percentage | 2.00% | 4.00% | 5.00%
Other Europe |  |  |
Revenue, Major Customer [Line Items] |  |  |
Concentration risk, percentage | 10.00% | 6.00% | 7.00%
Total Europe |  |  |
Revenue, Major Customer [Line Items] |  |  |
Concentration risk, percentage | 21.00% | 20.00% | 15.00%

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