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Commitments and Contingencies (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Apr. 29, 2025	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Restructuring Cost and Reserve [Line Items]
Research and development		$ 38,361	$ 31,257	$ 108,312	$ 91,900
General and administrative		10,304	$ 9,971	$ 31,500	$ 28,606
Reduction in Force
Restructuring Cost and Reserve [Line Items]
Expected workforce reduction percent	20.00%
Severance costs		1,900
Research and development		1,700
General and administrative		$ 200