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Short-term Investments (Tables) | 3 Months Ended
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Mar. 31, 2020
Investments Debt And Equity Securities [Abstract] |
Held-to-maturity Securities | The following table summarizes the held-to-maturity securities held at March 31, 2020 and December 31, 2019 (in thousands):
|  | Amortized Cost |  |  | Unrealized Gains |  |  | Unrealized Losses |  |  | Fair Value |
As of March 31, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. government securities |  | $ | 6,000 |  |  | $ | 18 |  |  | $ | (15 | ) |  | $ | 6,003 |
Commercial paper |  |  | 8,267 |  |  |  | — |  |  |  | — |  |  |  | 8,267 |
Total short-term investments |  | $ | 14,267 |  |  | $ | 18 |  |  | $ | (15 | ) |  | $ | 14,270 |
|  | Amortized Cost |  |  | Unrealized Gains |  |  | Unrealized Losses |  |  | Fair Value |
As of December 31, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. government securities |  | $ | 1,996 |  |  | $ | 15 |  |  | $ | (14 | ) |  | $ | 1,997 |
Commercial paper |  |  | 998 |  |  |  | — |  |  |  | — |  |  |  | 998 |
Overnight repurchase agreement |  |  | 3,500 |  |  |  | — |  |  |  | — |  |  |  | 3,500 |
Total short-term investments |  | $ | 6,494 |  |  | $ | 15 |  |  | $ | (14 | ) |  | $ | 6,495 |

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- Definition Tabular disclosure of information about investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27232-111563 + Details
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- References No definition available. + Details
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