Fair Value of Financial Assets and Liabilities - Marketable Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Fair Value of Financial Liabilities
Amortized Cost	$ 250,348	$ 215,490
Gross Unrealized Gains	553	282
Gross Unrealized Losses	(32)	(7)
Fair Value	250,869	215,765
Corporate Debt Securities and Commercial Paper
Fair Value of Financial Liabilities
Amortized Cost	200,864	215,490
Gross Unrealized Gains	379	282
Gross Unrealized Losses	(29)	(7)
Fair Value	201,214	$ 215,765
US Treasury Securities
Fair Value of Financial Liabilities
Amortized Cost	49,484
Gross Unrealized Gains	174
Gross Unrealized Losses	(3)
Fair Value	$ 49,655