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Other Intangible Assets (Tables) | 9 Months Ended
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Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of other intangible assets | Other intangible assets are as follows (in thousands):
| September 30, 2020 |  | December 31, 2019
| Cost (1) |  | Accumulated Amortization |  | Cost |  | Accumulated Amortization
Finite-lived intangible assets: |  |  |  |  |  |  |
Patents and technology | $ | — |  |  | $ | — |  |  | $ | 17,493 |  |  | $ | 6,715 |
Customer relationships | — |  |  | — |  |  | 15,367 |  |  | 6,013 |
Trademarks and brand names | — |  |  | — |  |  | 1,351 |  |  | 1,160 |
Total finite-lived intangible assets | $ | — |  |  | $ | — |  |  | $ | 34,211 |  |  | $ | 13,888 |
Carrying value: |  |  |  |  |  |  |
Other intangible assets, net | $ | — |  |  |  |  | $ | 20,323 |  |  |
(1) During the three months ended September 30, 2020, the Company recorded impairment charges to patents of $4.8 million, customer lists of $6.6 million, and trademarks and brand names of $1.1 million. See Note 10 - Impairment of Fixed and Long-lived Assets.

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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