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Fair Value Measurement (Tables) | 6 Months Ended
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Jun. 30, 2021
Fair Value Disclosures [Abstract] |
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis | The following table summarizes the financial instruments measured at fair value on a recurring basis classified in the fair value hierarchy (Level 1, 2 or 3) based on the inputs used for valuation in the accompanying unaudited condensed consolidated balance sheets:
|  | As of June 30, 2021 |  | As of December 31, 2020
Fair Value Measurements: |  | Level 1 |  | Level 2 |  | Level 3 |  | Level 1 |  | Level 2 |  | Level 3
Marketable securities (see Note 6) |  |  |  |  |  |  |  |  |  |  |  |
Mutual and money market funds |  | $ | 91,732 |  |  | $ | — |  |  | $ | — |  |  | $ | 104,672 |  |  | $ | — |  |  | $ | — |
Corporate bonds |  | — |  |  | 23,056 |  |  | — |  |  | — |  |  | 22,155 |  |  | — |
Government securities - U.S. |  | — |  |  | 17,853 |  |  | — |  |  | — |  |  | 18,999 |  |  | — |
Other fixed-income securities |  | — |  |  | 3,060 |  |  | — |  |  | — |  |  | 3,854 |  |  | — |
Total assets |  | $ | 91,732 |  |  | $ | 43,969 |  |  | $ | — |  |  | $ | 104,672 |  |  | $ | 45,008 |  |  | $ | — |

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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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