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Goodwill and Intangible Assets Intangibles (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2019 | Sep. 30, 2018
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | $ 39,662 | $ 41,625
Finite-Lived Intangible Assets, Accumulated Amortization | (12,127) | (11,035)
Intangible Assets, Net (Excluding Goodwill) | 27,535 | 30,590
Trademarks and Trade Names [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | 5,084 | 5,084
Finite-Lived Intangible Assets, Accumulated Amortization | (1,163) | (831)
Intangible Assets, Net (Excluding Goodwill) | $ 3,921 | $ 4,253
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 | (116) | (101)
Intangible Assets, Net (Excluding Goodwill) | 284 | 299
Customer Relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | 33,539 | 33,539
Finite-Lived Intangible Assets, Accumulated Amortization | (10,256) | (7,870)
Intangible Assets, Net (Excluding Goodwill) | $ 23,283 | $ 25,669
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 | (7) | (1)
Intangible Assets, Net (Excluding Goodwill) | $ 33 | $ 39
Backlog [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Asset, Useful Life | 1 year | 1 year
Finite-Lived Intangible Assets, Gross | $ 378 | $ 378
Finite-Lived Intangible Assets, Accumulated Amortization | (362) | (176)
Intangible Assets, Net (Excluding Goodwill) | $ 16 | $ 202
Construction Contracts [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Asset, Useful Life | 1 year | 1 year
Finite-Lived Intangible Assets, Gross | $ 221 | $ 2,184
Finite-Lived Intangible Assets, Accumulated Amortization | (223) | (2,056)
Intangible Assets, Net (Excluding Goodwill) | $ (2) | $ 128

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