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Cash Equivalents and Investments (Tables) | 3 Months Ended
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Mar. 31, 2020
Cash and Cash Equivalents [Abstract] |
Schedule of fair value of securities, not including cash | The following tables summarize the gross unrealized gains and losses of the Company’s marketable securities as of March 31, 2020 and December 31, 2019:
|  | March 31, 2020 |  |
|  | Gross Unrealized |  | Estimated Fair Value
|  | Amortized Cost |  | Gains |  | Losses |  | Credit Losses |
Money market funds |  | $ | 32,089 |  |  | $ | — |  |  | $ | — |  |  | — |  |  | $ | 32,089 |
Commercial paper |  | 7,061 |  |  | — |  |  | — |  |  | — |  |  | 7,061 |
Corporate notes |  | 14,466 |  |  | — |  |  | (44 | ) |  | — |  |  | 14,422 |
U.S. government securities |  | 7,786 |  |  | 103 |  |  | — |  |  | — |  |  | 7,889 |
U.S. asset-backed securities |  | 8,303 |  |  | 3 |  |  | — |  |  | — |  |  | 8,306 |
|  | $ | 69,705 |  |  | $ | 106 |  |  | $ | (44 | ) |  | $ | — |  |  | $ | 69,767 |
Classified as: |  |  |  |  |  |  |  |  |  |
Cash equivalents |  |  |  |  |  |  |  |  |  | $ | 32,090 |
Short term investments |  |  |  |  |  |  |  |  |  | 35,957 |
Long term investments |  |  |  |  |  |  |  |  |  | 1,720 |
|  |  |  |  |  |  |  | $ | 69,767 |
|  | December 31, 2019 |  |
|  | Gross Unrealized |  | Estimated Fair Value
(In thousands) |  | Amortized Cost |  | Gains |  | Losses |
Money market funds |  | $ | 5,381 |  |  | $ | — |  |  | $ | — |  |  | $ | 5,381 |
Commercial paper |  | 11,892 |  |  | — |  |  | — |  |  | 11,892 |
Corporate notes |  | 18,369 |  |  | 11 |  |  | — |  |  | 18,380 |
U.S. government securities |  | 11,291 |  |  | 4 |  |  | — |  |  | 11,295 |
U.S. asset-backed securities |  | 10,503 |  |  | 6 |  |  | — |  |  | 10,509 |
|  | $ | 57,436 |  |  | $ | 21 |  |  | $ | — |  |  | $ | 57,457 |
Classified as: |  |  |  |  |  |  |  |
Cash equivalents |  |  |  |  |  |  |  | $ | 5,381 |
Short-term investments |  |  |  |  |  |  |  | 42,829 |
Long term investments |  |  |  |  |  |  |  | 9,247 |
|  |  |  |  |  | $ | 57,457 |

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- Definition Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 + Details
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