Net Loss Per Share Attributable to Common Stockholders (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Numerator:
Net loss	$ (98,963)	$ (49,849)
Denominator:
Weighted-average shares of common stock outstanding	54,407,327	2,679,165
Less: Weighted-average shares of common stock subject to repurchase	(127,063)	(309,114)
Weighted-average shares of common stock outstanding, basic	54,280,264	2,370,051
Weighted-average shares of common stock outstanding, diluted	54,280,264	2,370,051
Net loss per share attributable to common stockholders, basic	$ (1.82)	$ (21.03)
Net loss per share attributable to common stockholders, diluted	$ (1.82)	$ (21.03)