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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($)
$ in Thousands
Total
Common Class A
Common Stock
Common Stock
Common Class A
Additional paid-in capital
Accumulated deficit
Beginning balance (in shares) at Dec. 31, 2022       1,688,824    
Beginning balance at Dec. 31, 2022 $ 38,607     $ 0 $ 342,734 $ (304,127)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Issuance of common stock upon exercise of stock options (in shares)       7,406    
Issuance of common stock upon exercise of stock options 92       92  
Issuance of common stock upon vesting of RSUs (in shares)       15,336    
Share repurchase related to Section 16 Officer tax coverage exchange (in shares)       (2,498)    
Share repurchase related to Section 16 Officer tax coverage exchange (60)       (60)  
Stock-based compensation - stock options, RSAs, RSUs 1,720       1,720  
Issuance of common stock and related warrants in registered offering, net of issuance costs (in shares)       187,920    
Issuance of common stock and related warrants in registered offering, net of issuance costs 9,300       9,300  
Issuance of common stock for consulting services (in shares)       2,700    
Issuance of common stock for consulting services 112       112  
Net loss (20,825)         (20,825)
Ending balance (in shares) at Mar. 31, 2023       1,899,688    
Ending balance at Mar. 31, 2023 28,946     $ 0 353,898 (324,952)
Beginning balance (in shares) at Dec. 31, 2022       1,688,824    
Beginning balance at Dec. 31, 2022 38,607     $ 0 342,734 (304,127)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net loss (39,660)          
Ending balance (in shares) at Jun. 30, 2023       1,957,308    
Ending balance at Jun. 30, 2023 12,757     $ 0 356,544 (343,787)
Beginning balance (in shares) at Mar. 31, 2023       1,899,688    
Beginning balance at Mar. 31, 2023 28,946     $ 0 353,898 (324,952)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Issuance of common stock upon exercise of stock options (in shares)       2,648    
Issuance of common stock upon exercise of stock options 38       38  
Issuance of common stock upon vesting of RSUs (in shares)       9,440    
Issuance of common stock upon purchase of ESPP (in shares)     2,131      
Issuance of common stock upon purchase of ESPP 31       31  
Stock-based compensation - stock options, RSAs, RSUs 2,577       2,577  
Issuance of common stock upon exercise of pre-funded warrants (in shares)       43,401    
Net loss (18,835)         (18,835)
Ending balance (in shares) at Jun. 30, 2023       1,957,308    
Ending balance at Jun. 30, 2023 12,757     $ 0 356,544 (343,787)
Beginning balance (in shares) at Dec. 31, 2023   8,283,865   8,283,865    
Beginning balance at Dec. 31, 2023 3,187     $ 0 376,234 (373,047)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Issuance of common stock upon vesting of RSUs (in shares)       36,570    
Share repurchase related to Section 16 Officer tax coverage exchange (in shares)       (5,937)    
Share repurchase related to Section 16 Officer tax coverage exchange (3)       (3)  
Stock-based compensation - stock options, RSAs, RSUs 1,443       1,443  
Issuance of common stock and related warrants in registered offering, net of issuance costs (in shares)       2,220,000    
Issuance of common stock and related warrants in registered offering, net of issuance costs 7,171       7,171  
Issuance of common stock upon exercise of pre-funded warrants (in shares)       6,091,280    
Net loss (8,313)         (8,313)
Ending balance (in shares) at Mar. 31, 2024       16,625,778    
Ending balance at Mar. 31, 2024 3,485     $ 0 384,845 (381,360)
Beginning balance (in shares) at Dec. 31, 2023   8,283,865   8,283,865    
Beginning balance at Dec. 31, 2023 3,187     $ 0 376,234 (373,047)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net loss (15,329)          
Ending balance (in shares) at Jun. 30, 2024   16,625,778   16,625,778    
Ending balance at Jun. 30, 2024 (1,796)     $ 0 386,580 (388,376)
Beginning balance (in shares) at Mar. 31, 2024       16,625,778    
Beginning balance at Mar. 31, 2024 3,485     $ 0 384,845 (381,360)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Stock-based compensation - stock options, RSAs, RSUs 1,735       1,735  
Net loss (7,016)         (7,016)
Ending balance (in shares) at Jun. 30, 2024   16,625,778   16,625,778    
Ending balance at Jun. 30, 2024 $ (1,796)     $ 0 $ 386,580 $ (388,376)