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Fair Value of Financial Instruments Including Cash, Cash Equivalents, and Investments (Tables) | 9 Months Ended
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Sep. 30, 2021
Fair Value Disclosures [Abstract] |
Schedule of Fair Value Levels, Assets Measured at Fair Value on Recurring Basis | The following tables present, for each of the fair value levels, the Company’s assets that are measured at fair value on a recurring basis at September 30, 2021 and at December 31, 2020:
|  | At September 30, 2021 |
|  | Quoted Prices in Active Markets for Identical Assets (Level 1 Inputs) |  |  | Significant Other Observable Inputs (Level 2 Inputs) |  |  | Significant Unobservable Inputs (Level 3 Inputs) |  |  | Total |
Cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 167,521 |  |  | $ | — |  |  | $ | — |  |  | $ | 167,521 |
Investments: |  |  |  |  |  |  |  |  |  |  |  |
Certificates of deposit |  |  | — |  |  |  | 90,000 |  |  |  | — |  |  |  | 90,000 |
Total |  | $ | 167,521 |  |  | $ | 90,000 |  |  | $ | — |  |  | $ | 257,521 |
|  | At December 31, 2020 |
|  | Quoted Prices in Active Markets for Identical Assets (Level 1 Inputs) |  |  | Significant Other Observable Inputs (Level 2 Inputs) |  |  | Significant Unobservable Inputs (Level 3 Inputs) |  |  | Total |
Cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 112,431 |  |  | $ | — |  |  | $ | — |  |  | $ | 112,431 |
Investments: |  |  |  |  |  |  |  |  |  |  |  |
Certificates of deposit |  |  | — |  |  |  | 100,000 |  |  |  | — |  |  |  | 100,000 |
Total |  | $ | 112,431 |  |  | $ | 100,000 |  |  | $ | — |  |  | $ | 212,431 |
Schedule of Investments | The following is a summary of investments as of September 30, 2021 and December 31, 2020, respectively:
|  | At September 30, 2021 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |
Investments: |  |  |  |  |  |  |  |  |  |  |  |
Certificates of deposit due in one year or less |  | $ | 90,000 |  |  | $ | — |  |  | $ | — |  |  | $ | 90,000 |
Total |  | $ | 90,000 |  |  | $ | — |  |  | $ | — |  |  | $ | 90,000 |
|  | At December 31, 2020 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |
Investments: |  |  |  |  |  |  |  |  |  |  |  |
Certificates of deposit due in one year or less |  | $ | 100,000 |  |  | $ | — |  |  | $ | — |  |  | $ | 100,000 |
Total |  | $ | 100,000 |  |  | $ | — |  |  | $ | — |  |  | $ | 100,000 |

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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class 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://fasb.org/us-gaap/role/ref/legacyRef -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://fasb.org/us-gaap/role/ref/legacyRef -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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- Definition Tabular disclosure of investment. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -URI http://asc.fasb.org/topic&trid=2197064 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -URI http://asc.fasb.org/topic&trid=75115024 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -URI http://asc.fasb.org/topic&trid=2196965 + Details
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