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Equity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Jan. 07, 2022
Nov. 15, 2021
Jan. 07, 2022
Sep. 30, 2022
Sep. 30, 2021
Aug. 31, 2022
Oct. 31, 2021
Aug. 31, 2021
Nov. 30, 2018
May 31, 2015
Equity                    
Share repurchase program authorized amount           $ 100,000   $ 100,000    
Repurchases of common stock       $ 6,422 $ 15,524          
Third Amendment to the Nucynta Commercialization Agreement                    
Equity                    
Number of shares that can be purchased                 1,041,667  
Exercise price of warrant (in dollars per share)                 $ 19.20  
ASR                    
Equity                    
Share repurchase program authorized amount             $ 25,000      
Price per share   $ 19.48                
Percentage of upfront payment on a price per share   80.00%                
Amount available for share repurchases under the program       $ 45,717            
Shares repurchased during the period 307,132 1,026,694 1,333,826 2,824,062            
Repurchases of common stock   $ 25,000   $ 54,283            
Shares repurchased, cost per share       $ 19.22            
2014 Stock Incentive Plan                    
Equity                    
Shares of common stock authorized for issuance (in shares)                   2,700,000
Increase in number of authorized shares on the first day of each fiscal year, as a percentage of outstanding common stock (as a percent)       4.00%            
Shares of common stock remaining available for future grant (in shares)       1,982,639            
Vesting period (in years)       4 years            
Contractual life (in years)       10 years            
Period following termination date vested options are exercisable (in months)       3 months