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Subsequent Event (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
Feb. 28, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Subsequent Event [Line Items]        
Severance costs   $ 776    
Revenue   103,269 $ 173,245 $ 150,246
Selling, general and administrative expenses   100,359 58,860 44,179
Research and development expenses   39,329 33,418 34,611
Noctiva        
Subsequent Event [Line Items]        
Revenue   1,204 0 $ 0
Noctiva | Specialty Pharma | Discontinued Operations, Disposed of by Means Other than Sale        
Subsequent Event [Line Items]        
Revenue   1,204 0  
Selling, general and administrative expenses   62,268 13,536  
Research and development expenses   $ 2,782 $ 1,688  
Subsequent event | Scenario, Forecast | Noctiva | Specialty Pharma        
Subsequent Event [Line Items]        
Workforce reduction, percentage 50.00%      
Subsequent event | Minimum | Scenario, Forecast | Noctiva | Specialty Pharma        
Subsequent Event [Line Items]        
Severance costs $ 10,000      
Subsequent event | Maximum | Scenario, Forecast | Noctiva | Specialty Pharma        
Subsequent Event [Line Items]        
Severance costs $ 15,000