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Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of components of intangible assets |
|  |  |  |  | As of December 31, 2020 |  |  | As of December 31, 2019 |
(in thousands, |  | Useful life |  |  | Gross |  |  | Accumulated |  |  | Net Carrying |  |  | Gross |  |  | Accumulated |  |  | Net Carrying |
except useful life) |  | (years) |  |  | Cost |  |  | Amortization |  |  | Value |  |  | Cost |  |  | Amortization |  |  | Value |
Indefinite-lived non-amortizing: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
License agreement |  |  |  |  |  | $ | 8,456 |  |  | $ | — |  |  | $ | 8,456 |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Trademarks |  |  |  |  |  |  | 30 |  |  |  | — |  |  |  | 30 |  |  |  | 67 |  |  |  | (67 | ) |  |  | — |
Definite-lived amortizing: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Patents |  |  | 14-18 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 564 |  |  |  | (564 | ) |  |  | — |
Internet domain |  |  | 15 |  |  |  | 900 |  |  |  | (190 | ) |  |  | 710 |  |  |  | 900 |  |  |  | (130 | ) |  |  | 770 |
License agreement |  |  | 1 |  |  |  | 2,220 |  |  |  | (2,220 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Internal-use software |  |  | 3 |  |  |  | 921 |  |  |  | (172 | ) |  |  | 749 |  |  |  | 366 |  |  |  | (35 | ) |  |  | 331 |
Intangible assets, net |  |  |  |  |  | $ | 12,527 |  |  | $ | (2,582 | ) |  | $ | 9,945 |  |  | $ | 1,897 |  |  | $ | (796 | ) |  | $ | 1,101 |
Schedule of estimated amortization expense for definite-lived intangible assets |
(in thousands) |  |  |
Year ended December 31, |  |  |
2021 |  | $ | 359 |
2022 |  |  | 325 |
2023 |  |  | 245 |
2024 |  |  | 60 |
2025 |  |  | 60 |
Thereafter |  |  | 410 |
Total future amortization for definite-lived intangible assets |  | $ | 1,459 |

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