The following tables present the fair value hierarchy for assets and liabilities measured at fair value:


	September 30, 2024
	Level 1		Level 2		Level 3		Total Fair Value
Cash equivalents
Money market funds	$	483,640	$	—	$	—	$	483,640
U.S. treasury bills	199,150		—		—		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 securities	207,023		—		—		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 1		Level 2		Level 3		Total Fair Value
Cash equivalents
Money market funds	$	627,983	$	—	$	—	$	627,983
U.S. treasury bills	230,602		—		—		230,602
Short-term investments
U.S. treasury securities	240,256		—		—		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