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Statements of Stockholders’ Equity (Deficit) - USD ($)
$ in Thousands
Total
Follow-on Offering
A T M Sales Agreement
Preferred Stock
Series A Preferred Stock
Common Stock
Common Stock
Follow-on Offering
Common Stock
A T M Sales Agreement
Additional Paid In Capital
Additional Paid In Capital
Follow-on Offering
Additional Paid In Capital
A T M Sales Agreement
Accumulated Other Comprehensive Gain (Loss)
Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2019       0 33,562,665              
Beginning balance at Dec. 31, 2019 $ 79,457     $ 0 $ 1     $ 292,509     $ 6 $ (213,059)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                        
Issuance of common stock (in shares)         186,563              
Issuance of common stock 0             0        
Stock-based compensation expense 10,604             10,604        
Net loss (163,013)                     (163,013)
Other comprehensive loss (6)                   (6)  
Ending balance (in shares) at Dec. 31, 2020       0 33,749,228              
Ending balance at Dec. 31, 2020 (72,958)     $ 0 $ 1     303,113     0 (376,072)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                        
Issuance of common stock in connection with litigation settlement 48,421             48,421        
Issuance of common stock for conversion of convertible note (in shares)         3,136,869              
Issuance of common stock for conversion of convertible note 39,808             39,808        
Issuance of common stock (in shares)         643,872 10,350,000 934,367          
Issuance of common stock 655 $ 92,212 $ 10,910         655 $ 92,212 $ 10,910    
Stock-based compensation expense 9,638             9,638        
Net loss (46,810)                     (46,810)
Ending balance (in shares) at Dec. 31, 2021       0 55,576,988              
Ending balance at Dec. 31, 2021 $ 81,876     $ 0 $ 1     $ 504,757     $ 0 $ (422,882)