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Investments (Tables) | 12 Months Ended
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Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract] |
Summary of Investments Accounted for Available-for-Sale-Securities | The following tables summarize the Company’s investments accounted for as available-for-sale securities (in thousands, except years):
|  | December 31, 2021 |
|  | Maturity |  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Estimated |
|  | (in years) |  | cost |  |  | losses |  |  | gains |  |  | fair value |
US treasury securities |  | 1 or less |  | $ | 18,116 |  |  | $ | (19 | ) |  | $ | — |  |  |  | 18,097 |
Corporate debt securities |  | 1 or less |  |  | 2,824 |  |  |  | (2 | ) |  |  | — |  |  |  | 2,822 |
Commercial paper |  | 1 or less |  |  | 31,566 |  |  |  | — |  |  |  | — |  |  |  | 31,566 |
Supranational debt securities |  | 1 or less |  |  | 1,503 |  |  |  | — |  |  |  | — |  |  |  | 1,503 |
US treasury securities |  | 1-2 |  |  | 44,911 |  |  |  | (141 | ) |  |  |  |  |  | 44,770 |
Total |  |  |  | $ | 98,920 |  |  | $ | (162 | ) |  | $ | — |  |  | $ | 98,758 |
|  | December 31, 2020 |
|  | Maturity |  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Estimated |
|  | (in years) |  | cost |  |  | losses |  |  | gains |  |  | fair value |
US treasury securities |  | 1 or less |  | $ | 38,489 |  |  | $ | — |  |  | $ | 3 |  |  | $ | 38,492 |
Corporate debt securities |  | 1 or less |  |  | 3,794 |  |  |  | (1 | ) |  |  | — |  |  |  | 3,793 |
Commercial paper |  | 1 or less |  |  | 11,040 |  |  |  | — |  |  |  | — |  |  |  | 11,040 |
Total |  |  |  | $ | 53,323 |  |  | $ | (1 | ) |  | $ | 3 |  |  | $ | 53,325 |

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- Definition Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 + Details
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- References No definition available. + Details
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