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Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Revenue	$ 20,883	$ 15,474
Revenue from Contract with Customer | Customer Concentration Risk | Transferred over Time
Disaggregation of Revenue [Line Items]
Percentage of concentration risk	53.00%	57.00%
Fixed wing aircraft
Disaggregation of Revenue [Line Items]
Revenue	$ 12,845	$ 9,939
Rotorcraft
Disaggregation of Revenue [Line Items]
Revenue	3,394	3,150
Commercial space
Disaggregation of Revenue [Line Items]
Revenue	2,448	1,333
Energy components for power generation units
Disaggregation of Revenue [Line Items]
Revenue	1,028	613
Commercial product and other revenue
Disaggregation of Revenue [Line Items]
Revenue	1,168	439
Commercial revenue
Disaggregation of Revenue [Line Items]
Revenue	11,157	7,662
Military revenue
Disaggregation of Revenue [Line Items]
Revenue	$ 9,726	$ 7,812

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