Fair Value Measurements - Recurring Fair Value Measurements (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Assets
Short-term investments	$ 157,540	$ 179,409
Fair Value, Measurements, Recurring
Assets
Total assets measured at fair value	849,292	938,838
Level 1 | Fair Value, Measurements, Recurring
Assets
Total assets measured at fair value	751,073	841,284
Level 2 | Fair Value, Measurements, Recurring
Assets
Total assets measured at fair value	98,219	97,554
Level 3 | Fair Value, Measurements, Recurring
Assets
Total assets measured at fair value	0	0
Money market funds | Fair Value, Measurements, Recurring
Assets
Cash equivalents	377,756	458,195
Money market funds | Level 1 | Fair Value, Measurements, Recurring
Assets
Cash equivalents	377,756	458,195
Money market funds | Level 2 | Fair Value, Measurements, Recurring
Assets
Cash equivalents	0	0
Money market funds | Level 3 | Fair Value, Measurements, Recurring
Assets
Cash equivalents	0	0
U.S. treasury bills | Fair Value, Measurements, Recurring
Assets
Cash equivalents	225,889	214,189
U.S. treasury bills | Level 1 | Fair Value, Measurements, Recurring
Assets
Cash equivalents	225,889	214,189
U.S. treasury bills | Level 2 | Fair Value, Measurements, Recurring
Assets
Cash equivalents	0	0
U.S. treasury bills | Level 3 | Fair Value, Measurements, Recurring
Assets
Cash equivalents	0	0
Commercial paper | Fair Value, Measurements, Recurring
Assets
Cash equivalents	1,438	8,028
Commercial paper | Level 1 | Fair Value, Measurements, Recurring
Assets
Cash equivalents	0	0
Commercial paper | Level 2 | Fair Value, Measurements, Recurring
Assets
Cash equivalents	1,438	8,028
Commercial paper | Level 3 | Fair Value, Measurements, Recurring
Assets
Cash equivalents	0	0
Corporate debt securities | Fair Value, Measurements, Recurring
Assets
Cash equivalents	67,848	53,238
Corporate debt securities | Level 1 | Fair Value, Measurements, Recurring
Assets
Cash equivalents	0	0
Corporate debt securities | Level 2 | Fair Value, Measurements, Recurring
Assets
Cash equivalents	67,848	53,238
Corporate debt securities | Level 3 | Fair Value, Measurements, Recurring
Assets
Cash equivalents	0	0
Certificate of deposits | Fair Value, Measurements, Recurring
Assets
Cash equivalents	18,821	25,779
Certificate of deposits | Level 1 | Fair Value, Measurements, Recurring
Assets
Cash equivalents	0	0
Certificate of deposits | Level 2 | Fair Value, Measurements, Recurring
Assets
Cash equivalents	18,821	25,779
Certificate of deposits | Level 3 | Fair Value, Measurements, Recurring
Assets
Cash equivalents	0	0
U.S. treasury securities | Fair Value, Measurements, Recurring
Assets
Short-term investments	147,428	168,900
U.S. treasury securities | Level 1 | Fair Value, Measurements, Recurring
Assets
Short-term investments	147,428	168,900
U.S. treasury securities | Level 2 | Fair Value, Measurements, Recurring
Assets
Short-term investments	0	0
U.S. treasury securities | Level 3 | Fair Value, Measurements, Recurring
Assets
Short-term investments	0	0
Asset-backed securities | Fair Value, Measurements, Recurring
Assets
Short-term investments	10,112	10,509
Asset-backed securities | Level 1 | Fair Value, Measurements, Recurring
Assets
Short-term investments	0	0
Asset-backed securities | Level 2 | Fair Value, Measurements, Recurring
Assets
Short-term investments	10,112	10,509
Asset-backed securities | Level 3 | Fair Value, Measurements, Recurring
Assets
Short-term investments	$ 0	$ 0