Quarterly report pursuant to Section 13 or 15(d)

Investments - Narrative (Details)

v3.19.1
Investments - Narrative (Details)
$ in Millions
3 Months Ended
Mar. 31, 2019
USD ($)
shares
Investment [Line Items]  
Total assets of equity method investees | $ $ 171.3
Total (liabilities) of equity method investees | $ (51.5)
Net losses of equity method investees | $ 35.3
Market value | $ $ 14.5
Pharmsynthez  
Investment [Line Items]  
Ownership percentage, equity method 9.00%
Cocrystal  
Investment [Line Items]  
Ownership percentage, equity method 8.00%
Number of shares into which warrants may be converted (in shares) 33,000
Non-Invasive Monitoring Systems, Inc.  
Investment [Line Items]  
Ownership percentage, equity method 1.00%
Neovasc  
Investment [Line Items]  
Ownership percentage, equity method 5.00%
InCellDx, Inc  
Investment [Line Items]  
Ownership percentage, equity method 29.00%
Number of shares into which warrants may be converted (in shares) 700,000
BioCardia, Inc.  
Investment [Line Items]  
Ownership percentage, equity method 5.00%
Ownership percentage 5.00%
Number of shares into which warrants may be converted (in shares) 400,000
Investment options, vested (in shares) 200,000
Xenetic Biosciences, Inc.  
Investment [Line Items]  
Ownership percentage, equity method 4.00%
Number of shares into which warrants may be converted (in shares) 500,000
Phio Pharmaceuticals  
Investment [Line Items]  
Ownership percentage 0.20%
Number of shares into which warrants may be converted (in shares) 22,000
VBI Vaccines Inc  
Investment [Line Items]  
Ownership percentage 7.00%
ChromaDex  
Investment [Line Items]  
Ownership percentage 0.10%
MabVax  
Investment [Line Items]  
Ownership percentage 1.00%
Eloxx Pharmaceuticals  
Investment [Line Items]  
Ownership percentage 4.00%
Zebra  
Investment [Line Items]  
Ownership percentage, equity method 29.00%
Series A-2 Preferred Stock | Zebra  
Investment [Line Items]  
Investment owned (in shares) 1,260,000
Restricted Stock | Zebra  
Investment [Line Items]  
Shares received as a gift (in shares) 900,000