Quarterly report pursuant to Section 13 or 15(d)

Warrant Liabilities - Fair value of warrant liabilities by Level 3 inputs (Details)

v3.20.1
Warrant Liabilities - Fair value of warrant liabilities by Level 3 inputs (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 03, 2020
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Warrants to purchase shares of common stock 27,388,464    
Fair value of warrant liabilities by Level 3 inputs      
Beginning balance $ 320    
Issuance of the January 2020 Warrants 1,654    
Change in fair value 923 $ 0  
Reclassification of warrants to additional paid-in capital (2,897)    
Ending balance $ 0    
Warrant      
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Warrants to purchase shares of common stock     11,552,314