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Goodwill and other Identifiable Intangible Assets (Tables) | 12 Months Ended
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Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Amortizable Identifiable Intangible Assets | Amortizable identifiable intangible assets, net as of September 30, 2021 and 2020 were comprised of the following (in thousands):
| September 30, 2021 |  | September 30, 2020
| Gross carrying amount |  | Accum. amort. |  | Net |  | Gross carrying amount |  | Accum. amort. |  | Net
Purchased and core technology | $ | 69,162 |  |  | $ | (50,701) |  |  | $ | 18,461 |  |  | $ | 76,011 |  |  | $ | (55,482) |  |  | $ | 20,529 |
License agreements | 112 |  |  | (112) |  |  | — |  |  | 112 |  |  | (112) |  |  | — |
Patents and trademarks | 23,491 |  |  | (14,978) |  |  | 8,513 |  |  | 22,836 |  |  | (13,535) |  |  | 9,301 |
Customer relationships | 130,278 |  |  | (39,973) |  |  | 90,305 |  |  | 125,500 |  |  | (34,232) |  |  | 91,268 |
Non-compete agreements | 600 |  |  | (600) |  |  | — |  |  | 600 |  |  | (450) |  |  | 150 |
Order backlog | 1,000 |  |  | (250) |  |  | 750 |  |  | — |  |  | — |  |  | — |
Total | $ | 224,643 |  |  | $ | (106,614) |  |  | $ | 118,029 |  |  | $ | 225,059 |  |  | $ | (103,811) |  |  | $ | 121,248 |
Schedule of Amortization Expense | Amortization expense for fiscal years 2021, 2020 and 2019 was as follows (in thousands):
Fiscal year | Total
2021 | $ | 16,534 |
2020 | $ | 14,754 |
2019 | $ | 8,818 |
Schedule of Estimated Future Amortization Expense Related to Identifiable Intangible Assets | Estimated amortization expense for the next five fiscal years is as follows (in thousands):
Fiscal year | Total
2022 | $ | 16,570 |
2023 | $ | 13,579 |
2024 | $ | 12,865 |
2025 | $ | 9,408 |
2026 | $ | 9,176 |
Schedule of Changes in Carrying Amount of Goodwill | The changes in the carrying amount of goodwill by reportable segments are (in thousands):
| IoT Products & Services |  | IoT Solutions |  | Total
Balance on September 30, 2019 | $ | 103,519 |  |  | $ | 49,903 |  |  | $ | 153,422 |
Acquisitions | 56,242 |  |  | — |  |  | 56,242 |
Foreign currency translation adjustment | 604 |  |  | (133) |  |  | 471 |
Balance on September 30, 2020 | $ | 160,365 |  |  | $ | 49,770 |  |  | $ | 210,135 |
Acquisition | 13,472 |  |  | — |  |  | 13,472 |
Adjustments | 847 |  |  | — |  |  | 847 |
Foreign currency translation adjustment | 496 |  |  | 572 |  |  | 1,068 |
Balance on September 30, 2021 | $ | 175,180 |  |  | $ | 50,342 |  |  | $ | 225,522 |

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