Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY

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CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Total
Warrants Related To debt arrangement
At The Market
Private Placement
Private Placement
Pre-Funded Warrant
Follow On Offering
Common Stock
Common Stock
At The Market
Common Stock
Private Placement
Common Stock
Private Placement
Pre-Funded Warrant
Common Stock
Follow On Offering
Additional Paid-In Capital
Additional Paid-In Capital
Warrants Related To debt arrangement
Additional Paid-In Capital
At The Market
Additional Paid-In Capital
Private Placement
Additional Paid-In Capital
Private Placement
Pre-Funded Warrant
Additional Paid-In Capital
Follow On Offering
Accumulated Other Comprehensive (Loss) Gain
Accumulated Deficit
Balance at Dec. 31, 2019 $ 79,184           $ 4         $ 372,139           $ 24 $ (292,983)
Balance (in shares) at Dec. 31, 2019             4,336,780                        
Exercise of stock options 1,076                     1,076              
Exercise of stock options, Shares             17,072                        
Vesting of restricted stock units, Shares             10,936                        
Issuance of common stock / preferred stock, warrants, net of issuance costs   $ 302 $ 11,919             $ 1     $ 302 $ 11,919          
Issuance of common stock / preferred stock, warrants, net of issuance costs (in shares)               220,181   1,031,250                  
Issuance of shares under Employee Stock Purchase Plan 433                     433              
Issuance of shares under Employee Stock Purchase Plan, Shares             5,955                        
Exercise of warrants 9                     9              
Exercise of warrants, Shares             100                        
Stock-based compensation expense 10,939                     10,939              
Other comprehensive gain (loss) (24)                                 (24)  
Net loss (84,038)                                   (84,038)
Balance at Dec. 31, 2020 90,553           $ 5         467,569             (377,021)
Balance (in shares) at Dec. 31, 2020             5,622,274                        
Exercise of stock options 157                     157              
Exercise of stock options, Shares             2,013                        
Vesting of restricted stock units, Shares             28,685                        
Issuance of common stock / preferred stock, warrants, net of issuance costs           $ 70,468         $ 1           $ 70,467    
Issuance of common stock / preferred stock, warrants, net of issuance costs (in shares)                     540,000                
Issuance of shares under Employee Stock Purchase Plan 323                     323              
Issuance of shares under Employee Stock Purchase Plan, Shares             9,431                        
Stock-based compensation expense 10,354                     10,354              
Other comprehensive gain (loss) (79)                                 (79)  
Net loss (86,558)                                   (86,558)
Balance at Dec. 31, 2021 $ 85,218           $ 6         548,870           (79) (463,579)
Balance (in shares) at Dec. 31, 2021 6,202,403           6,202,403                        
Exercise of stock options, Shares 3,770           3,770                        
Vesting of restricted stock units $ 1           $ 1                        
Vesting of restricted stock units, Shares             86,066                        
Issuance of common stock / preferred stock, warrants, net of issuance costs       $ 60,112 $ 70,753       $ 6           $ 60,106 $ 70,752      
Issuance of common stock / preferred stock, warrants, net of issuance costs (in shares)                 6,387,173                    
Issuance of shares under Employee Stock Purchase Plan 217                     217              
Issuance of shares under Employee Stock Purchase Plan, Shares             48,560                        
Issuance of shares in merger, net of issuance cost 65,332           $ 7         65,325              
Issuance of shares in merger, net of issuance cost, Shares             7,546,014                        
Cancellation of fractional shares due to reverse stock split (81)                     (81)              
Cancellation of fractional shares due to reverse stock split, shares             (10,870)                        
Stock-based compensation expense 11,410                     11,410              
Other comprehensive gain (loss) 181                                 181  
Net loss (94,654)                                   (94,654)
Balance at Dec. 31, 2022 $ 127,736           $ 20         $ 685,847           $ 102 $ (558,233)
Balance (in shares) at Dec. 31, 2022 20,263,116           20,263,116