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Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2023 | Sep. 30, 2022
Disaggregation of Revenue [Line Items] |  |
Revenue | $ 87,022 | $ 83,902
Transferred over Time | Revenue from Contract with Customer Benchmark | Customer Concentration Risk |  |
Disaggregation of Revenue [Line Items] |  |
Percentage of concentration risk | 46.00% | 56.00%
North America |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | $ 66,067 | $ 68,333
Europe |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 20,955 | 15,569
Fixed wing aircraft |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 40,094 | 39,474
Rotorcraft |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 16,369 | 15,602
Energy components for power generation units |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 23,033 | 17,396
Commercial product and other revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 7,526 | 11,430
Commercial revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 48,358 | 39,786
Military revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | $ 38,664 | $ 44,116

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