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v3.25.2

Supporting Financial Information - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Amortization expense of intangible assets | $ 4.1 | $ 4.1 | $ 12.3 | $ 12.3
Intangible assets, remaining amortization period | 6 years 8 months 12 days |  | 6 years 8 months 12 days |
Depreciation | $ 0.2 | $ 0.2 | $ 0.5 | $ 0.4
Disposition of equipment and improvements | 3.9 |  |  |
Cash proceeds from disposition of assets | $ 0.0 |  |  |
Customer contracts and related customer relationships |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Intangible assets, remaining amortization period | 6 years 8 months 12 days |  | 6 years 8 months 12 days |
Backlog |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Intangible assets, remaining amortization period | 6 years 7 months 6 days |  | 6 years 7 months 6 days |
Trade name |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Intangible assets, remaining amortization period | 7 years |  | 7 years |
Covenants-not-to-compete |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Intangible assets, remaining amortization period | 5 years 3 months 18 days |  | 5 years 3 months 18 days |

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