REVENUE - Schedule of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Disaggregation of Revenue [Line Items]
Total revenues	$ 73,222	$ 22,333	$ 119,245	$ 33,702
Product sales
Disaggregation of Revenue [Line Items]
Total revenues	72,591	18,309	116,103	29,664
IBSRELA
Disaggregation of Revenue [Line Items]
Total revenues	35,445	18,309	63,806	29,664
XPHOZAH
Disaggregation of Revenue [Line Items]
Total revenues	37,146	0	52,297	0
Product supply revenue
Disaggregation of Revenue [Line Items]
Total revenues	13	3,260	2,139	3,262
Licensing revenue
Disaggregation of Revenue [Line Items]
Total revenues	19	764	36	776
Non-cash royalty revenue related to the sale of future royalties
Disaggregation of Revenue [Line Items]
Total revenues	$ 599	$ 0	$ 967	$ 0