Quarterly report pursuant to Section 13 or 15(d)

Sale of Promacta License - Narrative (Details)

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Sale of Promacta License - Narrative (Details) - USD ($)
2 Months Ended 3 Months Ended
Mar. 05, 2019
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Revenue and gain from disposition of intangible assets   $ 827,000,000.0    
Intangible assets, net   216,290,000   $ 219,793,000
Revenue   43,484,000 $ 56,157,000  
Gain from sale of Promacta license   812,797,000 0  
Promacta        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Revenue $ 14,200,000 14,193,000 $ 15,573,000  
In Process Research and Development | Promacta        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Intangible assets, net   $ 0