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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-in- Capital
Accumulated Deficit
Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Dec. 31, 2021   3,626,073      
Beginning balance at Dec. 31, 2021 $ 11,232 $ 0 $ 181,301 $ (170,067) $ (2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Exercise of common stock warrants (in shares)   466,666      
Exercise of common stock warrants 14   14    
Equity-based compensation 342   342    
Vesting of restricted stock units and related repurchases (in shares)   324      
Vesting of restricted stock units and related repurchases (1)   (1)    
Other comprehensive loss, net (3)       (3)
Net loss (8,348)     (8,348)  
Ending balance (in shares) at Mar. 31, 2022   4,093,063      
Ending balance at Mar. 31, 2022 3,236 $ 0 181,656 (178,415) (5)
Beginning balance (in shares) at Dec. 31, 2021   3,626,073      
Beginning balance at Dec. 31, 2021 11,232 $ 0 181,301 (170,067) (2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Other comprehensive loss, net (3)        
Net loss (15,818)        
Ending balance (in shares) at Jun. 30, 2022   4,962,231      
Ending balance at Jun. 30, 2022 1,163 $ 0 187,053 (185,885) (5)
Beginning balance (in shares) at Mar. 31, 2022   4,093,063      
Beginning balance at Mar. 31, 2022 3,236 $ 0 181,656 (178,415) (5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Exercise of options (in shares)   124      
Exercise of options 1   1    
Equity-based compensation 507   507    
Vesting of restricted stock units and related repurchases (in shares)   324      
Vesting of restricted stock units and related repurchases (1)   (1)    
Issuance of common stock-ESPP (in shares)   1,351      
Issuance of common stock-ESPP 4   4    
Issuance of common stock, net (in shares)   867,369      
Issuance of common stock, net 4,886   4,886    
Other comprehensive loss, net 0        
Net loss (7,470)     (7,470)  
Ending balance (in shares) at Jun. 30, 2022   4,962,231      
Ending balance at Jun. 30, 2022 $ 1,163 $ 0 187,053 (185,885) $ (5)
Beginning balance (in shares) at Dec. 31, 2022 4,965,901 4,965,901      
Beginning balance at Dec. 31, 2022 $ 14,922 $ 0 187,571 (172,649)  
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Equity-based compensation 308   308    
Reclassification of common stock warrants to liability (800)   (800)    
Vesting of restricted stock units and related repurchases (in shares)   5,561      
Vesting of restricted stock units and related repurchases (1) $ 1 (2)    
Issuance of common stock, net (in shares)   3,400,000      
Issuance of common stock, net 4,597   4,597    
Net loss (4,407)     (4,407)  
Ending balance (in shares) at Mar. 31, 2023   8,371,462      
Ending balance at Mar. 31, 2023 $ 14,619 $ 1 191,674 (177,056)  
Beginning balance (in shares) at Dec. 31, 2022 4,965,901 4,965,901      
Beginning balance at Dec. 31, 2022 $ 14,922 $ 0 187,571 (172,649)  
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Exercise of options (in shares) 0        
Other comprehensive loss, net $ 0        
Net loss $ (10,171)        
Ending balance (in shares) at Jun. 30, 2023 8,648,307 8,648,307      
Ending balance at Jun. 30, 2023 $ 9,705 $ 1 192,524 (182,820)  
Beginning balance (in shares) at Mar. 31, 2023   8,371,462      
Beginning balance at Mar. 31, 2023 14,619 $ 1 191,674 (177,056)  
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Equity-based compensation 969   969    
Vesting of restricted stock units and related repurchases (in shares)   276,845      
Vesting of restricted stock units and related repurchases (119)   (119)    
Other comprehensive loss, net 0        
Net loss $ (5,764)     (5,764)  
Ending balance (in shares) at Jun. 30, 2023 8,648,307 8,648,307      
Ending balance at Jun. 30, 2023 $ 9,705 $ 1 $ 192,524 $ (182,820)