Schedule of Marketable Securities |
The table below summarizes the marketable securities as of September 30, 2019 and December 31, 2018: | | | | | | | | | | | | | | | | | | September 30, 2019 | | Amortized Cost | | Unrealized Gains | | Unrealized Losses | | Aggregate Fair Value | | (in thousands) | Money market funds | $ | 8,956 |
| | $ | — |
| | $ | — |
| | $ | 8,956 |
| Cash equivalents | 8,956 |
| | — |
| | — |
| | 8,956 |
| | | | | | | | | U.S. treasury securities | 74,881 |
| | 41 |
| | (12 | ) | | 74,910 |
| Corporate bonds | 8,693 |
| | 6 |
| | — |
| | 8,699 |
| Short-term investments | 83,574 |
| | 47 |
| | (12 | ) | | 83,609 |
| | | | | | | | | Corporate bonds | 5,251 |
| | 22 |
| | — |
| | 5,273 |
| Long-term investments | 5,251 |
| | 22 |
| | — |
| | 5,273 |
| Total marketable securities | $ | 97,781 |
| | $ | 69 |
| | $ | (12 | ) | | $ | 97,838 |
|
| | | | | | | | | | | | | | | | | | December 31, 2018 | | Amortized Cost | | Unrealized Gains | | Unrealized Losses | | Aggregate Fair Value | | (in thousands) | U.S. treasury securities | $ | 1,000 |
| | $ | — |
| | $ | — |
| | $ | 1,000 |
| Commercial paper | 6,635 |
| | — |
| | — |
| | 6,635 |
| Money market funds | 15,223 |
| | — |
| | — |
| | 15,223 |
| Cash equivalents | 22,858 |
| | — |
| | — |
| | 22,858 |
| | | | | | | | | U.S. treasury securities | 65,491 |
| | 2 |
| | (4 | ) | | 65,489 |
| Corporate bonds | 19,708 |
| | 15 |
| | (3 | ) | | 19,720 |
| Commercial paper | 11,894 |
| | — |
| | — |
| | 11,894 |
| Short-term investments | 97,093 |
| | 17 |
| | (7 | ) | | 97,103 |
| Total marketable securities | $ | 119,951 |
| | $ | 17 |
| | $ | (7 | ) | | $ | 119,961 |
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