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Intangible Assets (Tables) | 9 Months Ended
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Jun. 30, 2018
Goodwill And Intangible Assets Disclosure [Abstract] |
Schedule of Intangible Assets | Intangible assets consisted of the following:
|  | June 30, 2018 |
(Dollars in thousands) |  | Weighted Average Original Life (Years) |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net |
Definite-lived intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Customer lists and relationships |  |  | 8.9 |  |  | $ | 18,168 |  |  | $ | (9,004 | ) |  | $ | 9,164 |
Developed technology |  |  | 11.5 |  |  |  | 9,675 |  |  |  | (2,139 | ) |  |  | 7,536 |
Non-compete |  |  | 5.0 |  |  |  | 230 |  |  |  | (138 | ) |  |  | 92 |
Patents and other |  |  | 16.5 |  |  |  | 2,322 |  |  |  | (1,533 | ) |  |  | 789 |
Subtotal |  |  |  |  |  |  | 30,395 |  |  |  | (12,814 | ) |  |  | 17,581 |
Unamortized intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
In-process research and development |  |  |  |  |  |  | 269 |  |  |  | — |  |  |  | 269 |
Trademarks and trade names |  |  |  |  |  |  | 580 |  |  |  | — |  |  |  | 580 |
Total |  |  |  |  |  | $ | 31,244 |  |  | $ | (12,814 | ) |  | $ | 18,430 |
|  | September 30, 2017 |
(Dollars in thousands) |  | Weighted Average Original Life (Years) |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net |
Definite-lived intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Customer lists and relationships |  |  | 8.9 |  |  | $ | 18,293 |  |  | $ | (7,834 | ) |  | $ | 10,459 |
Developed technology |  |  | 11.7 |  |  |  | 9,297 |  |  |  | (1,478 | ) |  |  | 7,819 |
Non-compete |  |  | 5.0 |  |  |  | 230 |  |  |  | (103 | ) |  |  | 127 |
Patents and other |  |  | 16.5 |  |  |  | 2,321 |  |  |  | (1,423 | ) |  |  | 898 |
Subtotal |  |  |  |  |  |  | 30,141 |  |  |  | (10,838 | ) |  |  | 19,303 |
Unamortized intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
In-process research and development |  |  |  |  |  |  | 679 |  |  |  | — |  |  |  | 679 |
Trademarks and trade names |  |  |  |  |  |  | 580 |  |  |  | — |  |  |  | 580 |
Total |  |  |  |  |  | $ | 31,400 |  |  | $ | (10,838 | ) |  | $ | 20,562 |
Estimated Amortization Expense | Based on the intangible assets in service as of June 30, 2018, excluding any possible future amortization associated with acquired in-process research and development (“IPR&D”), which has not met technological feasibility as of June 30, 2018, estimated amortization expense for the remainder of fiscal 2018 and each of the next five fiscal years is as follows (in thousands):
Remainder of 2018 |  | $ | 675 |
2019 |  |  | 2,701 |
2020 |  |  | 2,526 |
2021 |  |  | 2,387 |
2022 |  |  | 2,347 |
2023 |  |  | 1,745 |

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