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Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue
Product revenues, net	$ 87,721	$ 76,511
Xtampza ER
Disaggregation of Revenue
Product revenues, net	35,409	31,507
Nucynta Products
Disaggregation of Revenue
Product revenues, net	52,312	45,004
Nucynta IR
Disaggregation of Revenue
Product revenues, net	30,526	27,970
Nucynta ER
Disaggregation of Revenue
Product revenues, net	$ 21,786	$ 17,034

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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