Annual report pursuant to Section 13 and 15(d)

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

v3.21.1
Warrant Liability - Fair value of warrant liabilities by Level 3 inputs (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Mar. 03, 2020
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Warrants to purchase shares of common stock 1,112,313    
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 $ (1,110)  
Reclassification of warrants to additional paid-in capital (2,897)    
Ending balance $ 0 $ 320  
Warrant      
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Warrants to purchase shares of common stock     385,078