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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 tables summarize the Company's marketable debt and equity securities (in thousands):
| March 31, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value |  |  |  |  |  |  |  |  |  |
Government-sponsored enterprises | $ | 13,713 |  |  | $ | 35 |  |  | $ | — |  |  | $ | 13,748 |  |  |  |  |  |  |  |  |  |  |
Corporate debt securities | 64,008 |  |  | 64 |  |  | (27) |  |  | 64,045 |  |  |  |  |  |  |  |  |  |  |
Total | $ | 77,721 |  |  | $ | 99 |  |  | $ | (27) |  |  | $ | 77,793 |  |  |  |  |  |  |  |  |  |  |
| December 31, 2019 |  |  |  |  |  |
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
Government-sponsored enterprises | $ | 13,216 |  |  | $ | 6 |  |  | $ | — |  |  | $ | 13,222 |
Corporate debt securities | 76,052 |  |  | 20 |  |  | (10) |  |  | 76,062 |
Total | $ | 89,268 |  |  | $ | 26 |  |  | $ | (10) |  |  | $ | 89,284 |
All available-for-sale marketable debt securities held as of March 31, 2020 and December 31, 2019 had contractual maturities of less than one year. All of the Company's available-for-sale marketable debt securities in an unrealized loss position as of March 31, 2020 and December 31, 2019 were in a loss position for less than 12 months. Unrealized losses on available-for-sale debt securities as of March 31, 2020 were not significant and were primarily due to changes in interest rates, including market credit spreads, and not due to increased credit risks associated with specific securities. Accordingly, no allowance for credit losses related to the Company's available-for-sale debt securities was recorded for the three months ended March 31, 2020. We do not intend to sell these investments and it is not more likely than not that we will be required to sell the investments before recovery of their amortized cost bases, which may be at maturity. No losses related to other-than-temporary impairments of our available-for-sale debt securities were recorded in Accumulated other comprehensive income during the year ended December 31, 2019

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