Segment Information - Schedule of Reportable Segment Revenue, Operating Expenses, and Net Loss (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2025	Jun. 30, 2024
Segment Reporting Information [Line Items]
Collaboration revenue	$ 0		$ 80,000		$ 0	$ 80,000
Operating expenses:
Research and development	12,987		17,261		26,391	37,034
Operating Expenses	19,815		27,508		40,218	57,342
General and administrative	6,828		10,247		13,827	20,308
(Loss) income from operations	(19,815)		52,492		(40,218)	22,658
Other income, net	2,519		2,917		5,267	5,881
Net Income (Loss)	(17,296)	$ (17,655)	55,409	$ (26,870)	(34,951)	28,539
Operating Segments [Member]
Segment Reporting Information [Line Items]
Collaboration revenue	0		80,000		0	80,000
Operating expenses:
Operating Expenses	19,815		27,508		40,218	57,342
Employee compensation expenses (excluding stock-based compensation expenses)	2,808		4,372		5,887	8,759
Stock-based compensation expenses	555		1,663		1,539	2,992
General and administrative	6,828		10,247		13,827	20,308
(Loss) income from operations	(19,815)		52,492		(40,218)	22,658
Other income, net	2,519		2,917		5,267	5,881
Net Income (Loss)	(17,296)		55,409		(34,951)	28,539
Operating Segments [Member] | Pociredir [Member]
Operating expenses:
Operating Expenses	4,093		1,706		8,357	3,804
Operating Segments [Member] | Losmapimod [Member]
Operating expenses:
Operating Expenses	(89)		6,181		935	14,475
Operating Segments [Member] | Pre Development Candidate Expenses [Member]
Operating expenses:
Operating Expenses	$ 5,620		$ 3,339		$ 9,673	$ 7,004