Net Income (Loss) Per Share Attributable to Common Stockholders - Potentially dilutive securities excluded from computation (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Net Loss Per Share Attributable to Common Stockholders
Potential dilutive shares excluded from computation of diluted net loss per share	24,832,417	18,155,884	24,832,417	19,188,091
Employee Stock Option
Net Loss Per Share Attributable to Common Stockholders
Potential dilutive shares excluded from computation of diluted net loss per share	21,486,374	17,746,130	21,486,374	18,190,124
RSUs issued and outstanding
Net Loss Per Share Attributable to Common Stockholders
Potential dilutive shares excluded from computation of diluted net loss per share	3,263,275	212,118	3,263,275	672,117
Common stock issuable under the 2024 ESPP
Net Loss Per Share Attributable to Common Stockholders
Potential dilutive shares excluded from computation of diluted net loss per share	74,777	135,993	74,777	264,207
Early exercised stock options and unvested restricted common stock
Net Loss Per Share Attributable to Common Stockholders
Potential dilutive shares excluded from computation of diluted net loss per share	7,991	61,643	7,991	61,643