Fair Value Measurements - Fair Value Recurring Basis (Details) - Recurring basis - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Assets
Total assets	$ 64,676	$ 150,288
U.S. Treasury securities
Assets
Investments		26,835
U.S. Government Agency securities
Assets
Investments		2,881
Cash.
Assets
Cash and cash equivalents, fair value	984	1,255
Money market funds
Assets
Cash and cash equivalents, fair value	63,692	119,317
Level 1
Assets
Total assets	64,676	120,572
Level 1 | Cash.
Assets
Cash and cash equivalents, fair value	984	1,255
Level 1 | Money market funds
Assets
Cash and cash equivalents, fair value	$ 63,692	119,317
Level 2
Assets
Total assets		29,716
Level 2 | U.S. Treasury securities
Assets
Investments		26,835
Level 2 | U.S. Government Agency securities
Assets
Investments		$ 2,881