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GOODWILL AND INTANGIBLE ASSETS | 12 Months Ended
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Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |
GOODWILL AND INTANGIBLE ASSETS [Text Block] | 6. GOODWILL AND INTANGIBLE ASSETS: The carrying amount of goodwill as of December 31, 2020 and 2019 was $91.8 million with no changes to goodwill in any of the respective fiscal years. Intangible assets consist primarily of developed technology, acquired licenses, customer relationships, trade name, domain name, in-process R&D and patent rights, and are reported net of accumulated amortization. The Company amortizes the cost of all intangible assets over the shorter of the estimated useful life or the term of the developed technology, customer relationships, technology licenses and in-place leases, which range from two to twelve years, with the exception of $1.3 million paid to acquire an internet domain name. The Company acquired the rights to the internet domain name www.power.com, which is now the Company’s primary domain name; the cost to acquire the domain name has been recorded as an intangible asset and will not be amortized as it has an indefinite useful life. Amortization of acquired intangible assets was approximately $4.4 million, $5.2 million and $5.3 million in the years ended December 31, 2020, 2019 and 2018, respectively. The Company does not believe there is any significant residual value associated with the following intangible assets:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2020 | ​ | December 31, 2019
​ |  | ​ | ​ |  | Accumulated |  | ​ | ​ |  | ​ | ​ |  | Accumulated |  | ​ | ​
(In thousands) | ​ | Gross | ​ | Amortization | ​ | Net | ​ | Gross | ​ | Amortization | ​ | Net
Domain name | ​ | $ | 1,261 | ​ | $ | — | ​ | $ | 1,261 | ​ | $ | 1,261 | ​ | $ | — | ​ | $ | 1,261
Developed technology | ​ |  | 37,960 | ​ |  | (29,126) | ​ |  | 8,834 | ​ |  | 37,960 | ​ |  | (25,933) | ​ |  | 12,027
Customer relationships | ​ |  | 16,700 | ​ |  | (15,687) | ​ |  | 1,013 | ​ |  | 20,030 | ​ |  | (18,098) | ​ |  | 1,932
Technology licenses | ​ |  | 1,926 | ​ |  | (528) | ​ |  | 1,398 | ​ |  | 1,926 | ​ |  | (281) | ​ |  | 1,645
Total intangible assets | ​ | $ | 57,847 | ​ | $ | (45,341) | ​ | $ | 12,506 | ​ | $ | 61,177 | ​ | $ | (44,312) | ​ | $ | 16,865
​ The estimated future amortization expense related to definite-lived intangible assets at December 31, 2020, is as follows:
​ | ​ | ​ | ​
​ |  | Estimated
​ | ​ | Amortization
Fiscal Year | ​ | (In thousands)
2021 | ​ | $ | 3,494
2022 | ​ |  | 2,415
2023 | ​ |  | 2,173
2024 | ​ |  | 1,279
2025 | ​ |  | 832
Thereafter | ​ |  | 1,052
Total | ​ | $ | 11,245
​

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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 http://asc.fasb.org/topic&trid=2144416 + Details
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