Sage Acquisition - Schedule of Pro Forma Information (Details) - Sage Therapeutics, Inc. - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Business Combination [Line Items]
Pro forma total revenues	$ 199,637	$ 187,560	$ 560,639	$ 516,085
Pro forma net loss	$ (24,386)	$ (62,559)	$ (140,531)	$ (321,112)