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Intangible Assets (Tables) | 3 Months Ended
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Mar. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of intangible assets | The Company’s intangible assets consist of the following:
| March 31, 2021 |  | December 31, 2020
| Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Amortized intangible assets |  |  |  |  |  |  |  |  |  |  |
Patents | $ | 1,814 |  |  | $ | (159) |  |  | $ | 1,655 |  |  | $ | 1,496 |  |  | $ | (139) |  |  | $ | 1,357 |
License agreements | 1,094 |  |  | (772) |  |  | 322 |  |  | 1,093 |  |  | (745) |  |  | 348 |
Total amortizable intangible assets | $ | 2,908 |  |  | $ | (931) |  |  | $ | 1,977 |  |  | $ | 2,589 |  |  | $ | (884) |  |  | $ | 1,705 |
Unamortized intangible assets |  |  |  |  |  |  |  |  |  |  |
Trademarks | $ | 351 |  |  | $ | — |  |  | $ | 351 |  |  | $ | 349 |  |  | $ | — |  |  | $ | 349 |
Total intangible asset, net | $ | 3,259 |  |  | $ | (931) |  |  | $ | 2,328 |  |  | $ | 2,938 |  |  | $ | (884) |  |  | $ | 2,054 |
Schedule of future amortization | License agreements are being amortized over periods ranging from 17-20 years. Patent costs are being amortized over periods of up to 20 years. Amortization expense was approximately $47 and $36 for the three months ended March 31, 2021 and 2020, respectively. As of March 31, 2021, future amortization of license agreements and patents is as follows:
Year Ending December 31, |
2021 (excluding the three months ended March 31, 2021) | $ | 150 |
2022 | 200 |
2023 | 168 |
2024 | 97 |
2025 | 97 |
Thereafter | 1,265 |
TOTAL | $ | 1,977 |

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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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