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v3.21.2

Short-term Investments (Tables) | 9 Months Ended
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Sep. 30, 2021
Investments, Debt and Equity Securities [Abstract] |
Schedule of Summary of Investments | The following is a summary of available-for-sale securities as of September 30, 2021 and December 31, 2020:
|  |  | As of September 30, 2021
| Contractual Maturity (in years) | Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Market Value
Mutual funds | --- |  | $ | 201,961,325 |  |  | $ | 1,341,184 |  |  | $ | (812,450) |  |  | $ | 202,490,059 |
U.S. treasury securities | Less than 1 |  | 119,670,627 |  |  | — |  |  | (2,087) |  |  | 119,668,540 |
Certificates of deposit | Less than 1 |  | 2,975,870 |  |  | 16,110 |  |  | (343) |  |  | 2,991,637 |
U.S. agency mortgage-backed securities | * |  | 1,859,828 |  |  | 11,789 |  |  | (22,617) |  |  | 1,849,000 |
|  |  | $ | 326,467,650 |  |  | $ | 1,369,083 |  |  | $ | (837,497) |  |  | $ | 326,999,236 |
|  |  | As of December 31, 2020
| Contractual Maturity (in years) | Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Market Value
Mutual funds | --- |  | $ | 153,177,675 |  |  | $ | 2,339,639 |  |  | $ | (644,140) |  |  | $ | 154,873,174 |
Certificates of deposit | Less than 1 |  | 3,000,000 |  |  | 26,260 |  |  | (10,000) |  |  | 3,016,260 |
U.S. agency mortgage-backed securities | * |  | 3,062,256 |  |  | — |  |  | (36,755) |  |  | 3,025,501 |
Total investments |  |  | $ | 159,239,931 |  |  | $ | 2,365,899 |  |  | $ | (690,895) |  |  | $ | 160,914,935 |
*No single maturity date.

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- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
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