Fair Value Measurements - Available-for-Sale Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Cash equivalents and short-term investments
Amortized Cost	$ 328,652	$ 425,168
Unrealized Gains	1	309
Unrealized Losses	(68)	(88)
Fair Value	$ 328,585	$ 425,389
Fair value hierarchy - Level 1	us-gaap:FairValueInputsLevel1Member	us-gaap:FairValueInputsLevel1Member
Money market funds | Cash and cash equivalents
Cash equivalents and short-term investments
Amortized Cost	$ 169,235	$ 161,094
Fair Value	169,235	161,094
U.S. Government treasury securities | Short-term investments
Cash equivalents and short-term investments
Amortized Cost	159,417	264,074
Unrealized Gains	1	309
Unrealized Losses	(68)	(88)
Fair Value	$ 159,350	$ 264,295