Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue
Total revenues	$ 83,751	$ 87,721
Xtampza ER
Disaggregation of Revenue
Total revenues	31,518	35,409
Nucynta IR
Disaggregation of Revenue
Total revenues	29,335	30,526
Nucynta ER
Disaggregation of Revenue
Total revenues	19,263	$ 21,786
Belbuca
Disaggregation of Revenue
Total revenues	3,310
Symproic
Disaggregation of Revenue
Total revenues	300
Elyxyb
Disaggregation of Revenue
Total revenues	$ 25