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Basis of Presentation and Significant Accounting Policies - Concentrations of Credit Risk - Additional Information (Details) - USD ($) $ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Sep. 30, 2023
Concentration Risk [Line Items] |  |
Percentage of cash balances | 72.00% | 56.00%
Investment, Type [Extensible Enumeration] | U S Treasuries And F D I C Insured [Member] | U S Treasuries And F D I C Insured [Member]
Amtech's |  |
Concentration Risk [Line Items] |  |
Cash Insured Limits | $ 8.2 | $ 6.0
Accounts Receivable | Customer Concentration Risk | Customer One |  |
Concentration Risk [Line Items] |  |
Concentration risk, percentage | 14.00% | 17.00%
Accounts Receivable | Customer Concentration Risk | Customer Two |  |
Concentration Risk [Line Items] |  |
Concentration risk, percentage | 14.00% | 17.00%

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