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Geographic Information and Concentrations (Tables) | 12 Months Ended
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Dec. 31, 2021
Risks and Uncertainties [Abstract] |
Schedule of Revenue by Geographic Areas | evenue by geographic areas for the years ended December 31, 2021, 2020 and 2019, are as follows (in thousands):
| Year Ended December 31,
| 2021 |  | 2020 |  | 2019
United States | $ | — |  |  | $ | — |  |  | $ | — |
International: |  |  |  |  |
North America (1) | 13 |  |  | 806 |  |  | — |
Asia Pacific (2) (3) | 10,084 |  |  | 6,765 |  |  | 5,281 |
Total revenue | $ | 10,097 |  |  | $ | 7,571 |  |  | $ | 5,281 |
_________________________________ (1)Revenues from North America are comprised of amounts earned from Canada in accordance with the Knight Agreement. (2)Revenues from Asia Pacific in 2021 and 2020 are comprised of amounts earned from Japan in accordance with the 2017 KKC Agreement and 2019 KKC Agreement. (3)Revenues from Asia Pacific in 2019 were comprised of $0.8 million from Japan in accordance with the 2017 KKC Agreement and 2019 KKC Agreement, $1.5 million from Hong Kong in accordance with the XuanZhu Agreement and $3.0 million from China in accordance with the Fosun Agreement.
Schedule of Collaboration Partnerships | Collaboration partnerships accounting for more than 10% of total revenues during the years ended December 31, 2021, 2020 and 2019 are as follows:
| Year Ended December 31,
| 2021 |  | 2020 |  | 2019
KKC | 100 | % |  | 89 | % |  | 15 | %
Knight | — | % |  | 11 | % |  | — | %
Fosun Pharma | — | % |  | — | % |  | 57 | %
XuanZhu | — | % |  | — | % |  | 28 | %

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