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Marketable Securities - Schedule of Marketable Securities (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Marketable Securities |  |
Amortized Cost | $ 203,205 | $ 302,133
Gross Unrealized Gains | 0 | 43
Gross Unrealized Losses | (270) | (1,051)
Fair Value | 202,935 | 301,125
U.S. Treasury securities |  |
Marketable Securities |  |
Amortized Cost | 159,288 | 219,895
Gross Unrealized Gains | 0 | 10
Gross Unrealized Losses | (238) | (801)
Fair Value | 159,050 | 219,104
U.S. Agency securities |  |
Marketable Securities |  |
Amortized Cost | 29,352 | 19,247
Gross Unrealized Gains | 0 | 19
Gross Unrealized Losses | (22) | (2)
Fair Value | 29,330 | 19,264
Certificates of deposit |  |
Marketable Securities |  |
Amortized Cost | 3,365 | 26,624
Gross Unrealized Gains | 0 | 4
Gross Unrealized Losses | 0 | (119)
Fair Value | 3,365 | 26,509
Corporate debt securities |  |
Marketable Securities |  |
Amortized Cost | 1,687 | 13,934
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (3) | (86)
Fair Value | 1,684 | 13,848
Commercial paper |  |
Marketable Securities |  |
Amortized Cost | 9,513 | 22,433
Gross Unrealized Gains | 0 | 10
Gross Unrealized Losses | (7) | (43)
Fair Value | $ 9,506 | $ 22,400

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