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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 options (in shares) 124 124      
Equity-based compensation $ 1,369   1,369    
Vesting of restricted stock units and related repurchases (in shares)   3,818      
Vesting of restricted stock units and related repurchases (4)   (4)    
Issuance of common stock-ESPP (in shares)   1,851      
Issuance of common stock-ESPP 5   5    
Issuance of common stock and warrants, net (in shares)   1,334,035      
Issuance of common stock and warrants, net 4,900   4,900    
Other comprehensive loss, net 2       2
Net loss $ (2,582)     (2,582)  
Ending balance (in shares) at Dec. 31, 2022 4,965,901 4,965,901      
Ending balance at Dec. 31, 2022 $ 14,922 $ 0 187,571 (172,649) 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Exercise of options (in shares) 0        
Reclassification of common stock warrants to liability $ (800)   (800)    
Equity-based compensation 1,348   1,348    
Vesting of restricted stock units and related repurchases (in shares)   284,852      
Vesting of restricted stock units and related repurchases (122) $ 1 (123)    
Issuance of common stock and warrants, net (in shares)   3,400,000      
Issuance of common stock and warrants, net 4,597   4,597    
Other comprehensive loss, net 0        
Net loss $ (16,914)     (16,914)  
Ending balance (in shares) at Dec. 31, 2023 8,650,753 8,650,753      
Ending balance at Dec. 31, 2023 $ 3,031 $ 1 $ 192,593 $ (189,563) $ 0