Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Exclusive of National Financial Instruments Measured at Fair Value on Recurring Basis (Details)

v3.20.2
Fair Value Measurements - Exclusive of National Financial Instruments Measured at Fair Value on Recurring Basis (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Assets    
Total $ 11,148 $ 11,148
Liabilities    
Liabilities 413 27
Warrants [Member]    
Liabilities    
Liabilities 413 27
Fair Value, Inputs, Level 1 [Member]    
Assets    
Total 0 0
Liabilities    
Liabilities 0 0
Fair Value, Inputs, Level 1 [Member] | Warrants [Member]    
Liabilities    
Liabilities 0 0
Fair Value, Inputs, Level 2 [Member]    
Assets    
Total 0 0
Liabilities    
Liabilities 0 0
Fair Value, Inputs, Level 2 [Member] | Warrants [Member]    
Liabilities    
Liabilities 0 0
Fair Value, Inputs, Level 3 [Member]    
Assets    
Total 11,148 11,148
Liabilities    
Liabilities 413 27
Fair Value, Inputs, Level 3 [Member] | Warrants [Member]    
Liabilities    
Liabilities 413 27
Caelum Convertible Notes [Member]    
Assets    
Fair value of investment 11,148 11,148
Caelum Convertible Notes [Member] | Fair Value, Inputs, Level 1 [Member]    
Assets    
Fair value of investment 0 0
Caelum Convertible Notes [Member] | Fair Value, Inputs, Level 2 [Member]    
Assets    
Fair value of investment 0 0
Caelum Convertible Notes [Member] | Fair Value, Inputs, Level 3 [Member]    
Assets    
Fair value of investment $ 11,148 $ 11,148