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Goodwill and Intangible Assets | 6 Months Ended
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Mar. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Intangible Assets | Goodwill and Intangible Assets Goodwill The following table outlines changes to the carrying amount of goodwill (in thousands):
| Goodwill
Balance at September 30, 2022 | $ | 365,147 |
Translation adjustments | 4,987 |
Balance at March 31, 2023 | $ | 370,134 |
Intangible Assets Intangible assets are stated at their original cost less accumulated amortization, and principally consist of acquired patents, technology, customer relationships and contracts, and trademarks. Intangible assets subject to amortization consisted of the following (in thousands):
| March 31, 2023 |  | September 30, 2022
Intangible Assets, Net | Cost | Accumulated Amortization | Net |  | Cost | Accumulated Amortization | Net
Acquired patents and technology | $ | 356,935 |  | $ | (265,914) |  | $ | 91,021 |  |  | $ | 355,622 |  | $ | (253,080) |  | $ | 102,542 |
Customer relationships | 66,187 |  | (58,417) |  | 7,770 |  |  | 66,142 |  | (56,572) |  | 9,570 |
Other intangible assets | 23,028 |  | (22,943) |  | 85 |  |  | 22,973 |  | (22,820) |  | 153 |
Total | $ | 446,150 |  | $ | (347,274) |  | $ | 98,876 |  |  | $ | 444,737 |  | $ | (332,472) |  | $ | 112,265 |
During the fiscal year-to-date period ended April 1, 2022, we purchased various patents for purchase consideration of $11.5 million, and upon acquisition, these intangible assets had a weighted-average useful life of 16.0 years. These intangible assets facilitate our R&D efforts, technologies, and potential product offerings. There were no purchases of intangible assets during the second quarter of fiscal 2023 and the fiscal year-to-date period ended March 31, 2023. Amortization expense for our intangible assets is included in cost of licensing, cost of products and services, R&D, S&M, and G&A expenses in our unaudited interim condensed consolidated statements of operations. Amortization expense was $7.0 million and $7.6 million in the second quarters of fiscal 2023 and 2022, respectively, and $13.3 million and $15.6 million in the fiscal year-to-date periods ended March 31, 2023 and April 1, 2022, respectively. As of March 31, 2023, expected amortization expense of our intangible assets in future fiscal periods was as follows (in thousands):
Fiscal Year | Amortization Expense
Remainder of 2023 | $ | 12,349 |
2024 | 23,773 |
2025 | 8,860 |
2026 | 7,969 |
2027 | 7,285 |
Thereafter | 38,640 |
Total | $ | 98,876 |

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI https://asc.fasb.org/topic&trid=2144416 + Details
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