REVENUE - Schedule of Disaggregated Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Total revenues	$ 152,069	$ 156,234
Product sales, net
Disaggregation of Revenue [Line Items]
Total revenues	149,451	155,121
ROLVEDON
Disaggregation of Revenue [Line Items]
Total revenues	18,175	0
INDOCIN products
Disaggregation of Revenue [Line Items]
Total revenues	87,217	100,338
Sympazan
Disaggregation of Revenue [Line Items]
Total revenues	9,938	1,768
Otrexup
Disaggregation of Revenue [Line Items]
Total revenues	12,026	11,148
SPRIX
Disaggregation of Revenue [Line Items]
Total revenues	9,150	9,110
CAMBIA
Disaggregation of Revenue [Line Items]
Total revenues	8,070	24,720
Zipsor
Disaggregation of Revenue [Line Items]
Total revenues	3,460	3,364
Other products
Disaggregation of Revenue [Line Items]
Total revenues	1,415	4,673
Royalties and milestone revenue
Disaggregation of Revenue [Line Items]
Total revenues	2,433	2,403
Other revenue
Disaggregation of Revenue [Line Items]
Total revenues	$ 185	$ (1,290)