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Fair Value Measurements (Tables) | 3 Months Ended
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Mar. 31, 2021
Fair Value Disclosures [Abstract] |
Schedule of Financial Assets Measured at Fair Value on Recurring Basis | The following tables present information about the Company’s financial assets measured at fair value on a recurring basis and indicate the fair value hierarchy classification of such fair values as of March 31, 2021 and December 31, 2020 (in thousands):
|  | Fair Value Measurements at |
|  | March 31, 2021 |
|  | Total |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Cash and cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash |  | $ | 494,170 |  |  | $ | 494,170 |  |  | $ | — |  |  | $ | — |
Money market funds |  |  | 629,357 |  |  |  | 629,357 |  |  |  | — |  |  |  | — |
Corporate debt securities |  |  | 2,532 |  |  |  | — |  |  |  | 2,532 |  |  |  | — |
Certificates of deposit |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Commercial paper |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Marketable securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Corporate debt securities |  |  | 535,630 |  |  |  | — |  |  |  | 535,630 |  |  |  | — |
Certificates of deposit |  |  | 54,273 |  |  |  | — |  |  |  | 54,273 |  |  |  | — |
Government-sponsored enterprise securities |  |  | 3,119 |  |  |  | — |  |  |  | 3,119 |  |  |  | — |
Commercial paper |  |  | 87,122 |  |  |  | — |  |  |  | 87,122 |  |  |  | — |
Other non-current assets |  |  | 2,212 |  |  |  | — |  |  |  | — |  |  |  | 2,212 |
Total |  | $ | 1,808,415 |  |  | $ | 1,123,527 |  |  | $ | 682,676 |  |  | $ | 2,212 |
|  | Fair Value Measurements at |
|  | December 31, 2020 |
|  | Total |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Cash and cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash |  | $ | 395,083 |  |  | $ | 395,083 |  |  | $ | — |  |  | $ | — |
Money market funds |  |  | 742,958 |  |  |  | 742,958 |  |  |  | — |  |  |  | — |
Corporate debt securities |  |  | 2,503 |  |  |  | — |  |  |  | 2,503 |  |  |  | — |
Certificates of deposit |  |  | 12,527 |  |  |  | — |  |  |  | 12,527 |  |  |  | — |
Commercial paper |  |  | 15,549 |  |  |  | — |  |  |  | 15,549 |  |  |  | — |
Marketable securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities |  |  | 47,979 |  |  |  | — |  |  |  | 47,979 |  |  |  | — |
Corporate debt securities |  |  | 324,456 |  |  |  | — |  |  |  | 324,456 |  |  |  | — |
Certificates of deposit |  |  | 25,162 |  |  |  | — |  |  |  | 25,162 |  |  |  | — |
Government-sponsored enterprise securities |  |  | 33,741 |  |  |  | — |  |  |  | 33,741 |  |  |  | — |
Commercial paper |  |  | 90,375 |  |  |  | — |  |  |  | 90,375 |  |  |  | — |
Other non-current assets |  |  | 600 |  |  |  | — |  |  |  | — |  |  |  | 600 |
Total |  | $ | 1,690,933 |  |  | $ | 1,138,041 |  |  | $ | 552,292 |  |  | $ | 600 |

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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=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 (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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