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Fair Value of Financial Instruments (Tables) | 3 Months Ended
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Mar. 31, 2021
Fair Value Disclosures [Abstract] |
Schedule of Fair Value Hierarchy for Its Cash Equivalents | The Company's fair value hierarchy for its financial instruments consists of cash equivalents as follows (in thousands):
| March 31, 2021
| Level 1 | Level 2 | Level 3 | Total
Money market securities | $ | 156,887 |  | $ | — |  | $ | — |  | $ | 156,887 |
Commercial paper | 2,643 |  | — |  | — |  | 2,643 |
Total | $ | 159,530 |  | $ | — |  | $ | — |  | $ | 159,530 |
| December 31, 2020
| Level 1 | Level 2 | Level 3 | Total
Money market securities | $ | 74,084 |  | $ | — |  | $ | — |  | $ | 74,084 |
Commercial paper | 1,584 |  | — |  | — |  | 1,584 |
Total | $ | 75,668 |  | $ | — |  | $ | — |  | $ | 75,668 |

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- Definition Tabular disclosure of assets measured at fair value measured on a recurring or nonrecurring basis. Includes, but is not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. + 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 (a) -URI http://asc.fasb.org/extlink&oid=117815213&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 (b) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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