Stock-Based Compensation - Schedule of Assumptions Used to Estimate Fair Value of Stock Options (Details)	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	May 31, 2023	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2023
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Risk-free interest rate		3.88%	3.99%	4.32%	4.04%
Expected term (in years)		6 years 1 month 6 days	6 years 1 month 6 days	6 years	6 years 1 month 6 days
Expected volatility		90.00%	90.00%	89.00%	89.00%
Performance Stock Options | Initial Options and Original Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Risk-free interest rate	4.02%
Expected term (in years)	6 years
Expected volatility	81.00%
Performance Stock Options | Modified Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Risk-free interest rate						3.90%
Expected term (in years)						5 years 9 months 18 days
Expected volatility						88.00%