Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.2
Fair Value Measurements (Roll Forward of the Changes in Fair Value of Level 3 Financial Instruments) (Details)
$ in Thousands
6 Months Ended
Jun. 30, 2021
USD ($)
Warrants [Member]  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Liabilities, Beginning Balance $ 0
Liabilities, Ending Balance 4,287
Contingent Payment Warrant [Member]  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Additions during the period 3,743
Placement Agent Warrants [Member]  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Additions during the period 544
Caelum [Member]  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Investment, Beginning Balance 17,566
Change in fair value of investments 30,918
Investment, Ending Balance $ 48,484