Statement of Stockholders' Equity - USD ($)
$ in Thousands
Common Stock
Secondary Public Offering, 2020
Common Stock
February Offering, 2021
Common Stock
Additional Paid-in Capital
Secondary Public Offering, 2020
Additional Paid-in Capital
February Offering, 2021
Additional Paid-in Capital
Private Placement
Additional Paid-in Capital
Shelf Registration Statement
Additional Paid-in Capital
Accumulated Deficit
Accumulated Other Comprehensive Income (Loss)
Secondary Public Offering, 2020
February Offering, 2021
Private Placement
Shelf Registration Statement
Total
Balance at Dec. 31, 2019     $ 1         $ 99,378 $ (66,770) $ (2)         $ 32,607
Balance (in shares) at Dec. 31, 2019     18,531,560                        
Increase (Decrease) in Stockholders' Equity                              
Issuance of common stock $ 1     $ 134,101             $ 134,102        
Issuance of common stock (in shares) 3,152,712                            
Exercise of options for common stock issued under equity incentive plan               1,817             1,817
Exercise of options for common stock issued under equity incentive plan (in shares)     522,160                        
Issuance costs           $ (47) $ (495)           $ (47) $ (495)  
Exercise of warrants of common stock (in shares)     287,229                        
Stock-based compensation expense               8,026             8,026
Net loss                 (93,961)           (93,961)
Other comprehensive income (loss)                   (110)         (110)
Balance at Dec. 31, 2020     $ 2         242,780 (160,731) (112)         81,939
Balance (in shares) at Dec. 31, 2020     22,493,661                        
Increase (Decrease) in Stockholders' Equity                              
Issuance of common stock   $ 1     $ 74,421             $ 74,422      
Issuance of common stock (in shares)   3,450,000                          
Exercise of options for common stock issued under equity incentive plan               511             $ 511
Exercise of options for common stock issued under equity incentive plan (in shares)     191,436                       191,436
Restricted Stock Unit released for common stock issued under Equity Incentive Plan (in shares)     52,562                        
Exercise of warrants of common stock               69             $ 69
Exercise of warrants of common stock (in shares)     27,855                        
Stock-based compensation expense               11,177             11,177
Net loss                 (105,584)           (105,584)
Other comprehensive income (loss)                   5         5
Balance at Dec. 31, 2021     $ 3         $ 328,958 $ (266,315) $ (107)         $ 62,539
Balance (in shares) at Dec. 31, 2021     26,215,514