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Short-Term Investments (Tables) | 9 Months Ended
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Sep. 30, 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:
Balance at September 30, 2022: |  | Amortized Cost Basis |  |  | Unrealized Loss |  |  | Fair Value |
|  | (in thousands) |
Treasury bills |  | $ | 5,999 |  |  | $ | (1 | ) |  | $ | 5,998 |
Commercial paper |  |  | 30,957 |  |  |  | — |  |  |  | 30,957 |
Corporate debt securities |  |  | 18,074 |  |  |  | (170 | ) |  |  | 17,904 |
Total short-term investments |  | $ | 55,030 |  |  | $ | (171 | ) |  | $ | 54,859 |
Balance at December 31, 2021: |  | Amortized Cost Basis |  |  | Unrealized Loss |  |  | Fair Value |
|  | (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 |

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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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