Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Change in Level 3 (Details)

v3.20.1
Fair Value Measurements - Change in Level 3 (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Gain (loss) on revaluation of warrant liabilities $ 2,519 $ (1,122)
Warrant Liability    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning Balance 4,307  
Gain (loss) on revaluation of warrant liabilities (2,519)  
Ending Balance 1,788  
Contingent Success Fee Liability    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning Balance 6  
Gain (loss) on revaluation of warrant liabilities 0  
Ending Balance $ 6