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Marketable Securities (Tables) | 6 Months Ended
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Jun. 30, 2020
Marketable Securities [Abstract] |
Marketable Securities | Marketable securities as of June 30, 2020 and December 31, 2019 consisted of the following:
June 30, 2020 | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
Money market mutual funds | $ | 22,498 |  |  | $ | — |  |  | $ | — |  |  | $ | 22,498 |
Total marketable securities designated as available-for-sale | $ | 22,498 |  |  | $ | — |  |  | $ | — |  |  | $ | 22,498 |
December 31, 2019 | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
Money market mutual funds | $ | 29,907 |  |  | $ | — |  |  | $ | — |  |  | $ | 29,907 |
Total marketable securities designated as available-for-sale | $ | 29,907 |  |  | $ | — |  |  | $ | — |  |  | $ | 29,907 |

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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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