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Marketable Securities | 3 Months Ended
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Mar. 31, 2020
Investments, Debt and Equity Securities [Abstract] |
Marketable Securities | Marketable Securities The following is a summary of the Company’s available-for-sale marketable securities as of March 31, 2020, which all have contractual maturities of less than two years:
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Market Value
(in thousands) |  |  |
U.S. Treasury and government agencies | $ | 87,014 |  |  | $ | 558 |  |  | $ | — |  |  | $ | 87,572 |
Corporate debt | 122,964 |  |  | 572 |  |  | (110 | ) |  | 123,426 |
Asset-backed securities | 36,386 |  |  | 56 |  |  | (64 | ) |  | 36,378 |
Total marketable securities | $ | 246,364 |  |  | $ | 1,186 |  |  | $ | (174 | ) |  | $ | 247,376 |
The following is a summary of the Company’s available-for-sale marketable securities as of December 31, 2019, which all have contractual maturities of less than two years:
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Market Value
(in thousands) |  |  |
U.S. Treasury and government agencies | $ | 88,535 |  |  | $ | 68 |  |  | $ | (2 | ) |  | $ | 88,601 |
Corporate debt | 129,860 |  |  | 196 |  |  | (1 | ) |  | 130,055 |
Asset-backed securities | 48,355 |  |  | 49 |  |  | (3 | ) |  | 48,401 |
Total marketable securities | $ | 266,750 |  |  | $ | 313 |  |  | $ | (6 | ) |  | $ | 267,057 |

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