Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements (Roll Forward of the Changes in Fair Value of Level 3 Financial Instruments) (Details)

v3.21.1
Fair Value Measurements (Roll Forward of the Changes in Fair Value of Level 3 Financial Instruments) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total, Beginning Balance $ 11,175 $ 10,905
Payment of convertible note   (9,914)
Disposal of National   (991)
Change in fair value of liabilities 1,189  
Change in fair value of investments 6,418 11,148
Reclass partner company's warrants from liability to equity (1,216)  
Change in fair value of convertible notes   27
Total, Ending Balance 17,566 11,175
Warrants [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Liabilities, Beginning Balance 27 991
Payment of convertible note   0
Disposal of National   (991)
Change in fair value of liabilities 1,189  
Change in fair value of investments 0 0
Reclass partner company's warrants from liability to equity (1,216)  
Change in fair value of convertible notes   27
Liabilities, Ending Balance 0 27
Origo [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Investment, Beginning Balance 11,148 0
Payment of convertible note   0
Disposal of National   0
Change in fair value of investments   11,148
Change in fair value of convertible notes   0
Investment, Ending Balance   11,148
Helocyte [Member] | Convertible Notes [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Liabilities, Beginning Balance 0 9,914
Payment of convertible note   (9,914)
Disposal of National   0
Change in fair value of investments   0
Change in fair value of convertible notes   0
Liabilities, Ending Balance   0
Caelum [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Investment, Beginning Balance 11,148  
Liabilities, Beginning Balance 0 9,914
Change in fair value of liabilities 0  
Change in fair value of investments 6,418  
Reclass partner company's warrants from liability to equity 0  
Change in fair value of convertible notes   9,914
Investment, Ending Balance 17,566 11,148
Liabilities, Ending Balance   0
Caelum [Member] | Warrants [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Liabilities, Beginning Balance 0 991
Liabilities, Ending Balance   0
Cyprium [Member] | Warrants [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Liabilities, Beginning Balance 27 0
Reclass partner company's warrants from liability to equity (1,216)  
Liabilities, Ending Balance $ 0 $ 27