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Short-Term Investments (Tables) | 12 Months Ended
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Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract] |
Schedule of Short-term Investments Classified as Available-for-sale | Short-term investments, which are classified as available-for-sale, consisted of the following:
December 31, 2022 |  | Amortized Cost Basis |  |  | Unrealized Gain |  |  | Unrealized Loss |  |  | Fair Values |
|  | (in thousands) |
Treasury notes |  | $ | 27,173 |  |  | $ | — |  |  | $ | (14 | ) |  | $ | 27,159 |
Treasury bills |  |  | 59,326 |  |  |  | 10 |  |  |  | (2 | ) |  |  | 59,334 |
Commercial paper |  |  | 134,375 |  |  |  | — |  |  |  | — |  |  |  | 134,375 |
Corporate debt securities |  |  | 58,795 |  |  |  | 13 |  |  |  | (55 | ) |  |  | 58,753 |
Agency bonds |  |  | 4,781 |  |  |  | 17 |  |  |  | 0 |  |  |  | 4,798 |
Total short-term investments |  | $ | 284,450 |  |  | $ | 40 |  |  | $ | (71 | ) |  | $ | 284,419 |
December 31, 2021 |  | Amortized Cost Basis |  |  | Unrealized Loss |  |  | Fair Values |
|  | (in thousands) |
Commercial paper |  | $ | 33,979 |  |  | $ | (1 | ) |  | $ | 33,978 |
Corporate debt securities |  |  | 11,953 |  |  |  | (4 | ) |  |  | 11,949 |
Total short-term investments |  |  | 45,932 |  |  |  | (5 | ) |  |  | 45,927 |
As of December 31, 2022 and 2021

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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 https://asc.fasb.org/topic&trid=2196928 + Details
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