Net Loss Per Share - Schedule of Computation of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2025	Sep. 30, 2024
Numerator:
Net loss	$ (50,855)	$ (9,196)	$ (32,345)	$ (19,140)	$ (23,379)	$ (20,932)	$ (92,396)	$ (63,451)
Denominator:
Weighted-average shares used to compute net loss per share, basic (in shares)	49,106,752			5,586,424			20,686,526	5,185,007
Weighted-average shares used to compute net loss per share, diluted (in shares)	49,106,752			5,586,424			20,686,526	5,185,007
Net loss per share, basic (in dollars per share)	$ (1.04)			$ (3.43)			$ (4.47)	$ (12.24)
Net loss per share, diluted (in dollars per share)	$ (1.04)			$ (3.43)			$ (4.47)	$ (12.24)