Revenue from Contracts with Customers - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Revenue from Contracts with Customers
Total product revenues, net	$ 199,878	$ 188,000	$ 393,398	$ 365,757
Belbuca
Revenue from Contracts with Customers
Total product revenues, net	57,669	52,600	110,318	104,258
Xtampza ER
Revenue from Contracts with Customers
Total product revenues, net	45,006	52,605	95,775	100,247
Jornay PM
Revenue from Contracts with Customers
Total product revenues, net	46,058	32,626	84,951	61,165
Nucynta IR
Revenue from Contracts with Customers
Total product revenues, net	14,356	26,501	40,434	53,918
Nucynta ER
Revenue from Contracts with Customers
Total product revenues, net	15,723	19,946	33,957	39,632
Azstarys
Revenue from Contracts with Customers
Total product revenues, net	12,910	0	12,910	0
Symproic
Revenue from Contracts with Customers
Total product revenues, net	3,020	3,722	7,213	6,537
Nucynta ER AG
Revenue from Contracts with Customers
Total product revenues, net	2,775	0	4,221	0
Nucynta IR AG
Revenue from Contracts with Customers
Total product revenues, net	$ 2,361	$ 0	$ 3,619	$ 0