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v3.20.1

Short-Term Investments (Tables) | 12 Months Ended
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Dec. 31, 2019
Short-Term Investments |
Summary of short-term investments | The following table summarizes the short-term investments held at December 31, 2019 and 2018 (in thousands):
|  |  |  | Gross Unrealized |  | Gross Unrealized |  |  |
|  | Amortized Cost |  | Gains |  | Losses |  | Fair Value
December 31, 2019 |  |  |  |  |  |  |  |  |  |  |  |
Commercial paper |  | $ | 1,993 |  | $ | — |  | $ | — |  | $ | 1,993
Corporate debt securities |  |  | 3,352 |  |  | — |  |  | — |  |  | 3,352
Reverse repurchase agreements |  |  | 21,000 |  |  | — |  |  | — |  |  | 21,000
Total |  | $ | 26,345 |  | $ | — |  | $ | — |  | $ | 26,345
|  |  |  | Gross Unrealized |  | Gross Unrealized |  |  |
|  | Amortized Cost |  | Gains |  | Losses |  | Fair Value
December 31, 2018 |  |  |  |  |  |  |  |  |  |  |  |
Corporate debt securities |  | $ | 7,280 |  | $ | — |  | $ | (4) |  | $ | 7,276
Reverse repurchase agreements |  |  | 15,000 |  |  | — |  |  | — |  |  | 15,000
Total |  | $ | 22,280 |  | $ | — |  | $ | (4) |  | $ | 22,276

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