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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2020
Accounting Policies [Abstract] |
Summary of Revenue and Accounts Receivable by Third-party Payors and Other Customers | The Company’s customers in excess of 10% of total revenue, and their related revenue as a percentage of total revenue were as follows:
|  | Year Ended |
|  | December 31, 2020 |
The Big Ten Conference |  |  | 30 | %
Centura Healthcare |  |  | 17 | %
Percent of total revenue |  |  | 47 | %
The Company’s third-party payors and other customers in excess of 10% of accounts receivable, and their related accounts receivable as a percentage of total accounts receivable were as follows:
|  | As of December 31, |
|  | 2020 |  |  | 2019 |
The Big Ten Conference |  |  | 35 | % |  |  | — | %
Centura Healthcare |  |  | 24 | % |  |  | — | %
Medicare |  |  | 6 | % |  |  | 18 | %
Covance Central Laboratory Services |  |  | 2 | % |  |  | 43 | %
Janssen Research and Development, LLC |  |  | 5 | % |  |  | 12 | %
Pfizer, Inc |  |  | 4 | % |  |  | 10 | %
Percent of total accounts receivable |  |  | 76 | % |  |  | 83 | %

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