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Fair Value Measurements - Available-for-Sale Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Cash equivalents and short-term investments
Amortized Cost	$ 377,563	$ 425,168
Unrealized Gains	109	309
Unrealized Losses		(88)
Fair Value	$ 377,672	$ 425,389
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Money market funds | Cash and cash equivalents
Cash equivalents and short-term investments
Amortized Cost	$ 166,318	$ 161,094
Fair Value	166,318	161,094
U.S. Government treasury securities | Short-term investments
Cash equivalents and short-term investments
Amortized Cost	211,245	264,074
Unrealized Gains	109	309
Unrealized Losses		(88)
Fair Value	$ 211,354	$ 264,295

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