Net Loss Per Share Attributable to Common Stockholders - Schedule of Outstanding Common Stock Equivalents Excluded from Diluted Net Loss Per Share (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total common stock equivalents	8,695,356	36,297,818	8,695,356	36,297,818
Employee Stock Option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total common stock equivalents	7,955,797	5,699,416	7,955,797	5,699,416
Early Exercised Stock Options and Unvested Restricted Common Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total common stock equivalents	0	3,102	0	3,102
Warrants to Purchase Common Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total common stock equivalents	739,559	739,559	739,559	739,559
Redeemable Convertible Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total common stock equivalents	0	29,855,741	0	29,855,741