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Revenue - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Mar. 31, 2022 | Mar. 31, 2021 | Sep. 30, 2021
Unearned Revenue (Details) |  |  |  |  |
Amortization | $ 1.1 | $ 0.5 | $ 1.9 | $ 1.0 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01 |  |  |  |  |
Unearned Revenue (Details) |  |  |  |  |
Remaining performance obligation, period | 12 months |  | 12 months |  |
Equipment |  |  |  |  |
Unearned Revenue (Details) |  |  |  |  |
Contract assets | $ 9.6 |  | $ 9.6 |  | $ 1.9
Equipment | Ventus |  |  |  |  |
Unearned Revenue (Details) |  |  |  |  |
Contract assets | $ 8.1 |  | $ 8.1 |  |

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