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Intangible Assets, Net and Goodwill | 6 Months Ended
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Jun. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Intangible Assets Disclosure [Text Block] | NOTE 3—INTANGIBLE ASSETS, NET Intangible assets, net consisted of the following:
(in thousands) |  | June 30, 2021 |  | December 31, 2020 |  | June 30, 2020
Intangible assets subject to amortization: |  |  |  |  |  |
Patents and purchased technology |  | $ | 14,198 |  |  | $ | 14,198 |  |  | 14,198 |
Customer relationships |  | 23,000 |  |  | 23,000 |  |  | 23,000 |
Gross carrying amount |  | 37,198 |  |  | 37,198 |  |  | 37,198 |
Accumulated amortization: |  |  |  |  |  |
Patents and purchased technology |  | (14,198) |  |  | (14,198) |  |  | (13,976) |
Customer relationships |  | (18,188) |  |  | (17,363) |  |  | (16,538) |
Accumulated amortization |  | (32,386) |  |  | (31,561) |  |  | (30,514) |
Net carrying amount |  | 4,812 |  |  | 5,637 |  |  | 6,684 |
Intangible assets not subject to amortization |  | 97,921 |  |  | 97,921 |  |  | 115,421 |
Intangible assets, net |  | $ | 102,733 |  |  | $ | 103,558 |  |  | $ | 122,105 |
Amortization expense for intangible assets subject to amortization was $0.4 million and $0.7 million for the three months ended June 30, 2021 and 2020, respectively, and was $0.8 million and $1.5 million for the six months ended June 30, 2021, and 2020, respectively. The following table presents the estimated annual amortization expense for the years ending 2021 through 2025:
(in thousands) |
2021 | $ | 1,650 |
2022 | 1,650 |
2023 | 1,650 |
2024 | 688 |
2025 | — |

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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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