Summary of Significant Accounting Policies - Concentrations (Details)	3 Months Ended
	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%