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Goodwill and Other Identifiable Intangible Assets, Net (Tables) | 6 Months Ended
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Mar. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Amortizable Intangible Assets | Amortizable intangible assets were (in thousands):
| March 31, 2019 |  | September 30, 2018
| Gross carrying amount |  | Accum. amort. |  | Net |  | Gross carrying amount |  | Accum. amort. |  | Net
Purchased and core technology | $ | 58,011 |  |  | $ | (49,938 | ) |  | $ | 8,073 |  |  | $ | 58,102 |  |  | $ | (48,693 | ) |  | $ | 9,409 |
License agreements | 102 |  |  | (60 | ) |  | 42 |  |  | 102 |  |  | (46 | ) |  | 56 |
Patents and trademarks | 15,835 |  |  | (12,777 | ) |  | 3,058 |  |  | 15,701 |  |  | (12,242 | ) |  | 3,459 |
Customer relationships | 46,530 |  |  | (23,226 | ) |  | 23,304 |  |  | 46,605 |  |  | (21,049 | ) |  | 25,556 |
Non-compete agreements | 600 |  |  | (270 | ) |  | 330 |  |  | 600 |  |  | (210 | ) |  | 390 |
Order backlog | 1,800 |  |  | (1,800 | ) |  | — |  |  | 1,800 |  |  | (1,350 | ) |  | 450 |
Total | $ | 122,878 |  |  | $ | (88,071 | ) |  | $ | 34,807 |  |  | $ | 122,910 |  |  | $ | (83,590 | ) |  | $ | 39,320 |
Schedule of Estimated Future Amortization Expense Related to Intangible Assets | Estimated amortization expense related to intangible assets for the remainder of fiscal 2019 and the five succeeding fiscal years is (in thousands):
2019 (six months) | $ | 4,193 |
2020 | 8,237 |
2021 | 7,430 |
2022 | 6,568 |
2023 | 4,392 |
2024 | 3,701 |
Schedule of Changes in Carrying Amount of Goodwill | The changes in the carrying amount of goodwill by reportable segments are (in thousands):
| Six Months Ended March 31, 2019
| IoT Products and Services |  | IoT Solutions |  | Total
Beginning balance, October 1 | $ | 104,358 |  |  | $ | 50,177 |  |  | $ | 154,535 |
Acquisitions | — |  |  | — |  |  | — |
Foreign currency translation adjustment | (122 | ) |  | (364 | ) |  | (486 | )
Ending balance, March 31 | $ | 104,236 |  |  | $ | 49,813 |  |  | $ | 154,049 |

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