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Fair value of financial instruments (Tables) | 12 Months Ended
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Dec. 31, 2023
Fair Value Disclosures [Abstract] |
Summary of Fair Values of Financial Instruments Measured on a Recurring Basis | The fair values of the financial instruments we measure at fair value on a recurring basis are as follows (in thousands):
| December 31, 2023
| Level 1 |  | Level 2 |  | Level 3 |  | Total
Cash equivalents: |  |  |  |  |  |  |
Money market funds | $ | 1,032,675 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,032,675 |
Commercial paper | — |  |  | 106,268 |  |  | — |  |  | 106,268 |
Certificates of deposit | — |  |  | 1,551 |  |  | — |  |  | 1,551 |
Corporate bonds | — |  |  | 859 |  |  | — |  |  | 859 |
Marketable securities: |  |  |  |  |  |  |
Corporate bonds | — |  |  | 427,957 |  |  | — |  |  | 427,957 |
Commercial paper | — |  |  | 201,145 |  |  | — |  |  | 201,145 |
U.S. treasury securities | 336,356 |  |  | — |  |  | — |  |  | 336,356 |
Certificates of deposit | — |  |  | 132,457 |  |  | — |  |  | 132,457 |
Non-U.S. government and supranational bonds | — |  |  | 8,983 |  |  | — |  |  | 8,983 |
U.S. agency bonds | — |  |  | 42,250 |  |  | — |  |  | 42,250 |
Prepaid expenses and other current assets: |  |  |  |  |  |  |
Certificates of deposit | — |  |  | 2,542 |  |  | — |  |  | 2,542 |
Restricted cash: |  |  |  |  |  |  |
Certificates of deposit | $ | — |  |  | $ | 4,054 |  |  | $ | — |  |  | $ | 4,054 |
| December 31, 2022
| Level 1 |  | Level 2 |  | Level 3 |  | Total
Cash equivalents: |  |  |  |  |  |  |
Money market funds | $ | 1,017,191 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,017,191 |
Commercial paper | — |  |  | 111,975 |  |  | — |  |  | 111,975 |
U.S. treasury securities | 5,990 |  |  | — |  |  | — |  |  | 5,990 |
Corporate bonds | — |  |  | 1,542 |  |  | — |  |  | 1,542 |
Marketable securities: |  |  |  |  |  |  |
Corporate bonds | — |  |  | 363,075 |  |  | — |  |  | 363,075 |
Commercial paper | — |  |  | 241,192 |  |  | — |  |  | 241,192 |
U.S. treasury securities | 242,916 |  |  | — |  |  | — |  |  | 242,916 |
Certificates of deposit | — |  |  | 158,246 |  |  | — |  |  | 158,246 |
Municipal securities | — |  |  | 27,449 |  |  | — |  |  | 27,449 |
Non-U.S. government and supranational bonds | — |  |  | 22,599 |  |  | — |  |  | 22,599 |
U.S. agency bonds | — |  |  | 31,687 |  |  | — |  |  | 31,687 |
Prepaid expenses and other current assets: |  |  |  |  |  |  |
Certificates of deposit | — |  |  | 1,067 |  |  | — |  |  | 1,067 |
Restricted cash: |  |  |  |  |  |  |
Certificates of deposit | $ | — |  |  | $ | 5,530 |  |  | $ | — |  |  | $ | 5,530 |

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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 -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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