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Summary of Significant Accounting Policies - Concentrations (Details) | 3 Months Ended
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Dec. 31, 2024 item customer | Dec. 31, 2023 item customer
Concentration of Credit Risk |  |
Number of banks for maintenance of cash balances | 2 |
Customer Concentration Risk | Revenues Net |  |
Concentrations |  |
Number of major customers | customer | 3 | 1
Supplier Concentration Risk | Inventory |  |
Concentrations |  |
Number of major suppliers | 1 | 3
Lockheed Martin Corporation | Customer Concentration Risk | Revenues Net |  |
Concentrations |  |
Concentration of risk (as a percent) | 38.00% |
Boeing | Customer Concentration Risk | Revenues Net |  |
Concentrations |  |
Concentration of risk (as a percent) | 9.00% |
Pilatus Aircraft Ltd ("Pilatus") | Customer Concentration Risk | Revenues Net |  |
Concentrations |  |
Concentration of risk (as a percent) | 8.00% | 29.00%

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