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Major Customers and Concentration of Credit Risk (Tables) | 12 Months Ended
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Dec. 31, 2019
Risks and Uncertainties [Abstract] |
Schedule of major customers and concentration risks |
Customer | 2019 Revenue |  | % of Total Revenue |  | 2018 Revenue |  | % of Total Revenue |  | 2017 Revenue |  | % of Total Revenue
ApolloBio | $ | — |  |  | — | % |  | $ | 23,000,000 |  |  | 75 | % |  | $ | — |  |  | — | %
AstraZeneca | 3,194,877 |  |  | 78 |  |  | 6,850,424 |  |  | 23 |  |  | 22,269,773 |  |  | 53 |
DARPA | — |  |  | — |  |  | — |  |  | — |  |  | 9,983,927 |  |  | 24 |
Roche | — |  |  | — |  |  | — |  |  | — |  |  | 6,107,254 |  |  | 14 |
All other, including affiliated entities | 917,053 |  |  | 22 |  |  | 631,473 |  |  | 2 |  |  | 3,859,132 |  |  | 9 |
Total revenue | $ | 4,111,930 |  |  | 100 | % |  | $ | 30,481,897 |  |  | 100 | % |  | $ | 42,220,086 |  |  | 100 | %

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