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Fair Value Measurements - Schedule of Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Assets:
Total	$ 945,245	$ 1,143,472
U.S. government treasuries
Assets:
Short-term marketable securities:	720,131	629,400
Long-term marketable securities:	66,852	334,892
Corporate debt securities
Assets:
Short-term marketable securities:	37,614	21,399
Long-term marketable securities:	11,611	24,481
Commercial paper
Assets:
Short-term marketable securities:		6,572
Level 1
Assets:
Total	896,020	1,091,020
Level 1 | U.S. government treasuries
Assets:
Short-term marketable securities:	720,131	629,400
Long-term marketable securities:	66,852	334,892
Level 1 | Corporate debt securities
Assets:
Short-term marketable securities:	0	0
Long-term marketable securities:	0	0
Level 1 | Commercial paper
Assets:
Short-term marketable securities:		0
Level 2
Assets:
Total	49,225	52,452
Level 2 | U.S. government treasuries
Assets:
Short-term marketable securities:	0	0
Long-term marketable securities:	0	0
Level 2 | Corporate debt securities
Assets:
Short-term marketable securities:	37,614	21,399
Long-term marketable securities:	11,611	24,481
Level 2 | Commercial paper
Assets:
Short-term marketable securities:		6,572
Level 3
Assets:
Total	0	0
Level 3 | U.S. government treasuries
Assets:
Short-term marketable securities:	0	0
Long-term marketable securities:	0	0
Level 3 | Corporate debt securities
Assets:
Short-term marketable securities:	0	0
Long-term marketable securities:	0	0
Level 3 | Commercial paper
Assets:
Short-term marketable securities:		0
Money market funds
Assets:
Cash equivalents:	109,037	126,728
Money market funds | Level 1
Assets:
Cash equivalents:	109,037	126,728
Money market funds | Level 2
Assets:
Cash equivalents:	0	0
Money market funds | Level 3
Assets:
Cash equivalents:	$ 0	$ 0

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