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Intangible Assets, Net - Components of Intangible Assets (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Amortized intangible assets |  |
Gross Carrying Amount | $ 3,359 | $ 2,589
Accumulated Amortization | (1,032) | (884)
Net Carrying Amount | 2,327 | 1,705
Unamortized intangible assets |  |
Intangible assets, gross | 3,733 | 2,938
Intangible assets, net | 2,701 | 2,054
Trademarks |  |
Unamortized intangible assets |  |
Carrying Amount | 374 | 349
Patents |  |
Amortized intangible assets |  |
Gross Carrying Amount | 2,258 | 1,496
Accumulated Amortization | (206) | (139)
Net Carrying Amount | 2,052 | 1,357
License agreements |  |
Amortized intangible assets |  |
Gross Carrying Amount | 1,101 | 1,093
Accumulated Amortization | (826) | (745)
Net Carrying Amount | $ 275 | $ 348

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