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INTANGIBLE ASSETS AND GOODWILL | 9 Months Ended
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Sep. 30, 2024
INTANGIBLE ASSETS AND GOODWILL |
INTANGIBLE ASSETS AND GOODWILL | (4) INTANGIBLE ASSETS AND GOODWILL The Company’s intangible assets at September 30, 2024 and December 31, 2023 consisted of the following (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Weighted | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | average | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | amortization | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Net
​ | ​ | period |  | ​ | ​ |  | Accumulated |  | carrying
September 30, 2024 |  | (years) | ​ | Cost |  | amortization |  | value
Developed technology | ​ | 7.84 | ​ | $ | 340,380 | ​ | $ | 257,078 | ​ | $ | 83,302
Customer relationships | ​ | 11.86 | ​ | ​ | 268,140 | ​ | ​ | 154,346 | ​ | ​ | 113,794
Trade names | ​ | 3.88 | ​ | ​ | 5,000 | ​ | ​ | 4,969 | ​ | ​ | 31
Software licenses |  | 3.00 |  | ​ | 5,748 |  | ​ | 3,553 |  | ​ | 2,195
​ |  | 9.50 | ​ | $ | 619,268 | ​ | $ | 419,946 | ​ | $ | 199,322
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Weighted | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | average | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | amortization | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Net
​ | ​ | period |  | ​ | ​ |  | Accumulated |  | carrying
December 31, 2023 |  | (years) | ​ | Cost |  | amortization |  | value
Developed technology | ​ | 7.84 | ​ | $ | 340,380 | ​ | $ | 239,066 | ​ | $ | 101,314
Customer relationships | ​ | 11.86 | ​ | ​ | 268,140 | ​ | ​ | 134,743 | ​ | ​ | 133,397
Trade names | ​ | 3.88 | ​ | ​ | 5,000 | ​ | ​ | 4,901 | ​ | ​ | 99
Software licenses |  | 3.00 |  | ​ | 5,436 |  | ​ | 2,159 |  | ​ | 3,277
​ |  | 9.51 | ​ | $ | 618,956 | ​ | $ | 380,869 | ​ | $ | 238,087
​ Estimated future amortization expense for the Company’s intangible assets at September 30, 2024 was as follows (in thousands):
​ | ​ | ​ | ​
Years ending December 31, |  |  | ​
Remainder of 2024 | ​ | $ | 11,785
2025 | ​ |  | 44,192
2026 | ​ |  | 39,143
2027 | ​ |  | 33,979
2028 | ​ |  | 23,400
2029 | ​ |  | 18,379
Thereafter | ​ | ​ | 28,444
​ | ​ | $ | 199,322
​ There were no changes to the carrying value of the Company’s goodwill in the nine months ended September 30, 2024 and 2023. The components of goodwill at both September 30, 2024 and 2023 were as follows (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Cloud and |  | IP Optical |  | ​ | ​
​ | ​ | Edge | ​ | Networks | ​ | Total
Goodwill | ​ | $ | 392,302 | ​ | $ | 191,996 | ​ | $ | 584,298
Accumulated impairment losses | ​ |  | (167,406) | ​ |  | (116,000) | ​ |  | (283,406)
​ | ​ | $ | 224,896 | ​ | $ | 75,996 | ​ | $ | 300,892
​

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-30/tableOfContent Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-20/tableOfContent + Details
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