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Acquisitions, Investments and Licenses - Equity and Cost Method Investments Narrative (Details)

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Acquisitions, Investments and Licenses - Equity and Cost Method Investments Narrative (Details)
$ in Millions
6 Months Ended
Jun. 30, 2018
USD ($)
Schedule of Equity Method Investments [Line Items]  
Total assets of equity method investees $ 363.3
Total (liabilities) of equity method investees (174.6)
Net (losses) of equity method investees (143.5)
Market value $ 40.1
Pharmsynthez  
Schedule of Equity Method Investments [Line Items]  
Ownership percentage, equity method 9.00%
Cocrystal  
Schedule of Equity Method Investments [Line Items]  
Ownership percentage, equity method 9.00%
Non-Invasive Monitoring Systems, Inc.  
Schedule of Equity Method Investments [Line Items]  
Ownership percentage, equity method 1.00%
Neovasc  
Schedule of Equity Method Investments [Line Items]  
Ownership percentage, equity method 6.00%
VBI Vaccines Inc  
Schedule of Equity Method Investments [Line Items]  
Ownership percentage, equity method 10.00%
InCellDx, Inc  
Schedule of Equity Method Investments [Line Items]  
Ownership percentage, equity method 29.00%
BioCardia, Inc.  
Schedule of Equity Method Investments [Line Items]  
Ownership percentage, equity method 5.00%
Xenetic Biosciences, Inc.  
Schedule of Equity Method Investments [Line Items]  
Ownership percentage, equity method 5.00%