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Commitments and Contingencies (Details) - USD ($)
1 Months Ended 9 Months Ended
Apr. 03, 2017
Feb. 05, 2016
Mar. 31, 2016
Sep. 30, 2017
Feb. 28, 2017
Dec. 31, 2016
Commitments            
Contingent consideration accrued       $ 190,457,000   $ 156,008,000
Sandoz Patent Infringement Lawsuit            
Commitments            
Period of time, patent infringement suit can be filed in federal district court   45 days        
Month stay period   30 months 30 months      
Endoceutics License Agreement            
Commitments            
Period after first commercial sale 10 years     10 years    
Palatin License Agreement | License Agreement Terms            
Commitments            
Maximum future contingent payments       $ 380,000,000.0    
Endoceutics License Agreement | Contingent Consideration            
Commitments            
Contingent consideration accrued       10,000,000    
First Sales Milestone | Endoceutics License Agreement | Endoceutics, Inc.            
Commitments            
Sales milestone $ 15,000,000.0     15,000,000.0    
Sales milestone, triggering amount 150,000,000.0     150,000,000.0    
First Sales Milestone | Palatin License Agreement | License Agreement Terms            
Commitments            
Sales milestone         $ 25,000,000.0  
Sales milestone, triggering amount         250,000,000.0  
Maximum future contingent payments         300,000,000.0  
Second Sales Milestone | Endoceutics License Agreement | Endoceutics, Inc.            
Commitments            
Sales milestone 30,000,000.0     30,000,000.0    
Sales milestone, triggering amount 300,000,000.0     300,000,000.0    
Third Sales Milestone | Endoceutics License Agreement | Endoceutics, Inc.            
Commitments            
Sales milestone 850,000,000.0     850,000,000.0    
Sales milestone, triggering amount 500,000,000.0     500,000,000.0    
Tiered Royalties | Endoceutics License Agreement            
Commitments            
Maximum future contingent payments $ 150,000,000.0     $ 150,000,000.0    
Royalty percentage, maximum 20.00%     20.00%    
Net sales threshold, future contingent payments $ 1,000,000,000.0     $ 1,000,000,000.0    
Regulatory milestone | Palatin License Agreement | License Agreement Terms            
Commitments            
Maximum future contingent payments         $ 80,000,000.0  
Regulatory milestone, acceptance by U.S. Food and Drug Administration for new drug application | Palatin License Agreement | License Agreement Terms            
Commitments            
Maximum future contingent payments       20,000,000    
Regulatory milestone, U.S. Food and Drug Administration approval | Palatin License Agreement | License Agreement Terms            
Commitments            
Maximum future contingent payments       $ 60,000,000