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Goodwill and Intangible Assets Intangibles (Details) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Sep. 30, 2021
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | $ 117,538 | $ 117,538
Finite-Lived Intangible Assets, Accumulated Amortization | (38,844) | (31,919)
Intangible Assets, Net (Excluding Goodwill) | 78,694 | 85,619
Trademarks and Trade Names [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | 15,262 | 15,262
Finite-Lived Intangible Assets, Accumulated Amortization | (3,751) | (2,891)
Intangible Assets, Net (Excluding Goodwill) | $ 11,511 | $ 12,371
Trademarks and Trade Names [Member] | Minimum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Asset, Useful Life | 5 years | 5 years
Trademarks and Trade Names [Member] | Maximum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Asset, Useful Life | 20 years | 20 years
Technical Library |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Asset, Useful Life | 20 years | 20 years
Finite-Lived Intangible Assets, Gross | $ 400 | $ 400
Finite-Lived Intangible Assets, Accumulated Amortization | (171) | (161)
Intangible Assets, Net (Excluding Goodwill) | 229 | 239
Customer Relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | 96,879 | 96,879
Finite-Lived Intangible Assets, Accumulated Amortization | (29,936) | (24,021)
Intangible Assets, Net (Excluding Goodwill) | $ 66,943 | $ 72,858
Customer Relationships [Member] | Minimum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Asset, Useful Life | 6 years | 6 years
Customer Relationships [Member] | Maximum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Asset, Useful Life | 15 years | 15 years
Noncompete Agreements [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Asset, Useful Life | 5 years | 5 years
Finite-Lived Intangible Assets, Gross | $ 40 | $ 40
Finite-Lived Intangible Assets, Accumulated Amortization | (29) | (25)
Intangible Assets, Net (Excluding Goodwill) | $ 11 | $ 15
Backlog [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Asset, Useful Life | 1 year | 1 year
Finite-Lived Intangible Assets, Gross | $ 4,957 | $ 4,957
Finite-Lived Intangible Assets, Accumulated Amortization | (4,957) | (4,821)
Intangible Assets, Net (Excluding Goodwill) | $ 0 | $ 136

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