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Fair Value Measurements (Tables)
 9 Months Ended
Sep. 30, 2024
Fair Value Disclosures [Abstract]  
Schedule of Assets and Liabilities at Fair Value
The following tables present the fair value hierarchy for assets and liabilities measured at fair value:
September 30, 2024
Level 1Level 2Level 3Total Fair Value
Cash equivalents
Money market funds$483,640 $— $— $483,640 
U.S. treasury bills199,150 — — 199,150 
Commercial paper— 16,603 — 16,603 
Corporate debt securities— 49,311 — 49,311 
Certificates of deposit
— 22,003 — 22,003 
Short-term investments
U.S. treasury securities207,023 — — 207,023 
Asset-backed securities— 10,546 — 10,546 
Total assets measured at fair value
$889,813 $98,463 $— $988,276 
December 31, 2023
Level 1Level 2Level 3Total Fair Value
Cash equivalents
Money market funds$627,983 $— $— $627,983 
U.S. treasury bills230,602 — — 230,602 
Short-term investments
U.S. treasury securities240,256 — — 240,256 
U.S. agency securities— 14,993 — 14,993 
Asset-backed securities— 10,500 — 10,500 
Corporate debt securities— 2,975 — 2,975 
Total assets measured at fair value
$1,098,841 $28,468 $— $1,127,309