Fair Value Measurements - Fair Value Recurring Basis (Details) - Recurring basis - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Assets
Total assets	$ 42,184	$ 150,288
U.S. Treasury securities
Assets
Investments		26,835
Agency securities
Assets
Investments		2,881
Cash
Assets
Cash and cash equivalents	1,092	1,255
Money market funds
Assets
Cash and cash equivalents	41,092	119,317
Level 1
Assets
Total assets	42,184	120,572
Level 1 | Cash
Assets
Cash and cash equivalents	1,092	1,255
Level 1 | Money market funds
Assets
Cash and cash equivalents	$ 41,092	119,317
Level 2
Assets
Total assets		29,716
Level 2 | U.S. Treasury securities
Assets
Investments		26,835
Level 2 | Agency securities
Assets
Investments		$ 2,881