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Fair Value Measurements (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Financial Assets |  |
Marketable securities: | $ 446,414 | $ 437,371
Government agency securities |  |
Financial Assets |  |
Marketable securities: | 170,207 | 159,357
Corporate notes/bonds |  |
Financial Assets |  |
Marketable securities: | 37,812 | 56,883
Commercial paper |  |
Financial Assets |  |
Marketable securities: | 12,587 | 29,816
U.S. Treasuries |  |
Financial Assets |  |
Marketable securities: | 143,271 | 49,793
Fair Value, Recurring |  |
Financial Assets |  |
Total financial assets | 450,291 | 441,248
Fair Value, Recurring | Government agency securities |  |
Financial Assets |  |
Marketable securities: | 170,207 | 159,357
Fair Value, Recurring | Corporate notes/bonds |  |
Financial Assets |  |
Marketable securities: | 37,812 | 56,883
Fair Value, Recurring | Commercial paper |  |
Financial Assets |  |
Marketable securities: | 12,587 | 29,816
Fair Value, Recurring | U.S. Treasuries |  |
Financial Assets |  |
Marketable securities: | 143,271 | 49,793
Fair Value, Recurring | Money market funds |  |
Financial Assets |  |
Cash equivalents: | 82,537 | 141,522
Restricted cash and other non-current assets: | $ 3,877 | $ 3,877
Restricted cash and cash equivalents, statement of financial position [extensible enumeration] | Restricted cash and other non-current assets | Restricted cash and other non-current assets
Fair Value, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Financial Assets |  |
Total financial assets | $ 229,685 | $ 195,192
Fair Value, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Government agency securities |  |
Financial Assets |  |
Marketable securities: | 0 | 0
Fair Value, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate notes/bonds |  |
Financial Assets |  |
Marketable securities: | 0 | 0
Fair Value, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial paper |  |
Financial Assets |  |
Marketable securities: | 0 | 0
Fair Value, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. Treasuries |  |
Financial Assets |  |
Marketable securities: | 143,271 | 49,793
Fair Value, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Money market funds |  |
Financial Assets |  |
Cash equivalents: | 82,537 | 141,522
Restricted cash and other non-current assets: | $ 3,877 | $ 3,877
Restricted cash and cash equivalents, statement of financial position [extensible enumeration] | Restricted cash and other non-current assets | Restricted cash and other non-current assets
Fair Value, Recurring | Significant Other Observable Inputs (Level 2) |  |
Financial Assets |  |
Total financial assets | $ 220,606 | $ 246,056
Fair Value, Recurring | Significant Other Observable Inputs (Level 2) | Government agency securities |  |
Financial Assets |  |
Marketable securities: | 170,207 | 159,357
Fair Value, Recurring | Significant Other Observable Inputs (Level 2) | Corporate notes/bonds |  |
Financial Assets |  |
Marketable securities: | 37,812 | 56,883
Fair Value, Recurring | Significant Other Observable Inputs (Level 2) | Commercial paper |  |
Financial Assets |  |
Marketable securities: | 12,587 | 29,816
Fair Value, Recurring | Significant Other Observable Inputs (Level 2) | U.S. Treasuries |  |
Financial Assets |  |
Marketable securities: | 0 | 0
Fair Value, Recurring | Significant Other Observable Inputs (Level 2) | Money market funds |  |
Financial Assets |  |
Cash equivalents: | 0 | 0
Restricted cash and other non-current assets: | 0 | 0
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) |  |
Financial Assets |  |
Total financial assets | 0 | 0
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Government agency securities |  |
Financial Assets |  |
Marketable securities: | 0 | 0
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Corporate notes/bonds |  |
Financial Assets |  |
Marketable securities: | 0 | 0
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Commercial paper |  |
Financial Assets |  |
Marketable securities: | 0 | 0
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | U.S. Treasuries |  |
Financial Assets |  |
Marketable securities: | 0 | 0
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Money market funds |  |
Financial Assets |  |
Cash equivalents: | 0 | 0
Restricted cash and other non-current assets: | $ 0 | $ 0

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