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Related Party Transactions (Details)
1 Months Ended 3 Months Ended
Feb. 28, 2018
USD ($)
shares
Nov. 30, 2017
USD ($)
shares
Jul. 31, 2017
USD ($)
shares
May 31, 2017
USD ($)
shares
Apr. 30, 2017
USD ($)
shares
Aug. 31, 2016
USD ($)
shares
Mar. 31, 2018
USD ($)
shares
Mar. 31, 2017
USD ($)
Jan. 01, 2017
USD ($)
ft²
Nov. 30, 2016
USD ($)
Zebra                    
Related Party Transaction [Line Items]                    
Stock ownership percentage             29.00%      
Equity method investment, ownership percentage             29.00%      
Neovasc                    
Related Party Transaction [Line Items]                    
Equity method investment, ownership percentage             1.00%      
Additional investment in equity method investment | $   $ 3,000,000                
Number of shares into which warrants may be converted (in shares)             4,900,000      
ChromaDex Corporation                    
Related Party Transaction [Line Items]                    
Ownership percentage             0.00%      
MabVax                    
Related Party Transaction [Line Items]                    
Ownership percentage             2.00%      
Available-for-sale investment, additional investment in period | $     $ 100,000 $ 500,000            
COCP                    
Related Party Transaction [Line Items]                    
Equity method investment, ownership percentage             9.00%      
Additional investment in equity method investment | $         $ 1,000,000 $ 2,000,000        
Number of shares into which warrants may be converted (in shares)             1,000,000      
InCellDx, Inc                    
Related Party Transaction [Line Items]                    
Equity method investment, ownership percentage             29.00%      
Number of shares into which warrants may be converted (in shares)             700,000      
BioCardia, Inc.                    
Related Party Transaction [Line Items]                    
Equity method investment, ownership percentage             5.00%      
Ownership percentage             5.00%      
Number of shares into which warrants may be converted (in shares)             400,000      
NIMS                    
Related Party Transaction [Line Items]                    
Ownership percentage             1.00%      
Frost Real Estate Holdings LLC                    
Related Party Transaction [Line Items]                    
Area of real estate property (in square feet) | ft²                 29,500  
Lease payments per month in first year | $                 $ 81,000  
Lease payments per month in third year | $                 $ 86,000  
Reimbursement Of Travel Expense | Dr Frost                    
Related Party Transaction [Line Items]                    
Reimbursement paid to related party for travel | $             $ 79,000 $ 20,000    
Common Stock | Neovasc                    
Related Party Transaction [Line Items]                    
Equity method investment, additional investment in period (in shares)   2,054,794                
Common Stock | COCP                    
Related Party Transaction [Line Items]                    
Equity method investment, additional investment in period (in shares)         138,889 162,602        
Series G Preferred Stock | MabVax                    
Related Party Transaction [Line Items]                    
Available-for-sale investment, additional investment in period (in shares)     50,714              
Series L Preferred Stock | MabVax                    
Related Party Transaction [Line Items]                    
Available-for-sale investment, additional investment in period (in shares)       1,667            
Series I Preferred Stock | MabVax                    
Related Party Transaction [Line Items]                    
Available-for-sale investment, additional investment in period (in shares)       107,607            
Museum of Science, Inc | Dr Frost and Mr Pfenniger                    
Related Party Transaction [Line Items]                    
Related party future contribution | $                   $ 1,000,000
Convertible Debt | COCP                    
Related Party Transaction [Line Items]                    
Additional investment in equity method investment | $ $ 1,000,000                  
Convertible Debt | Common Stock | COCP                    
Related Party Transaction [Line Items]                    
Shares issues upon conversion (in shares) 123,456                  
5% Convertible Notes | Convertible Debt                    
Related Party Transaction [Line Items]                    
Debt face amount | $ $ 55,000,000.0                  
Series A Warrant | Neovasc                    
Related Party Transaction [Line Items]                    
Number of shares into which warrants may be converted (in shares)   2,054,794                
Series B Warrant | Neovasc                    
Related Party Transaction [Line Items]                    
Number of shares into which warrants may be converted (in shares)   2,054,794                
Series C Warrant | Neovasc                    
Related Party Transaction [Line Items]                    
Number of shares into which warrants may be converted (in shares)   822,192