Revenue - Schedule of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Total revenues	$ 407,320	$ 333,615	$ 124,456
Product sales, net
Disaggregation of Revenue [Line Items]
Total revenues	$ 377,808	$ 319,196	$ 82,526
Product sales, net | Gross product revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration risk (percent)	92.80%	95.70%	66.30%
IBSRELA
Disaggregation of Revenue [Line Items]
Total revenues	$ 274,207	$ 158,286	$ 80,062
XPHOZAH
Disaggregation of Revenue [Line Items]
Total revenues	103,601	160,910	2,464
Product supply revenue
Disaggregation of Revenue [Line Items]
Total revenues	15,879	11,649	6,121
Licensing revenue
Disaggregation of Revenue [Line Items]
Total revenues	5,088	78	35,809
Non-cash royalty revenue related to the sale of future royalties
Disaggregation of Revenue [Line Items]
Total revenues	$ 8,545	$ 2,692	$ 0