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CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (DEFICIT) - 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       120,631    
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)       721    
Issuance of common stock upon exercise of stock options 130       130  
Issuance of common stock upon vesting of RSUs (in shares)       3,055    
Issuance of common stock upon purchase of ESPP (in shares)     225      
Issuance of common stock upon purchase of ESPP 33       33  
Share repurchase related to Section 16 Officer tax coverage exchange (in shares)       (351)    
Share repurchase related to Section 16 Officer tax coverage exchange (88)       (88)  
Issuance of common stock and related warrants in registered offering, net of issuance costs (in shares)       49,138    
Issuance of common stock and related warrants in registered offering, net of issuance costs 16,952       16,952  
Issuance of common stock upon exercise of pre-funded warrants (in shares)       158,312    
Issuance of common stock upon cashless exercise of warrants (in shares)       255,516    
Issuance of common stock upon exercise of warrants 7,881       7,881  
Stock-based compensation - stock options, RSAs, RSUs 8,480       8,480  
Issuance of common stock for consulting services (in shares)       193    
Issuance of common stock for consulting services 112       112  
Common stock issued in connection with reverse stock split (in shares)       4,272    
Net loss (68,920)         (68,920)
Ending balance (in shares) at Dec. 31, 2023   591,712   591,712    
Ending 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)       4,388    
Share repurchase related to Section 16 Officer tax coverage exchange (in shares)       (548)    
Share repurchase related to Section 16 Officer tax coverage exchange (4)       (4)  
Issuance of common stock and related warrants in registered offering, net of issuance costs (in shares)       388,572    
Issuance of common stock and related warrants in registered offering, net of issuance costs 11,591       11,591  
Issuance of pre-funded warrants and warrants in private placement, net of issuance costs 2,443       2,443  
Issuance of common stock upon exercise of pre-funded warrants (in shares)       1,159,235    
Issuance of common stock upon cashless exercise of warrants (in shares)       637,238    
Issuance of warrants with convertible notes 1,305       1,305  
Issuance of warrants with loan payable 121       121  
Issuance of warrants for debt issuance costs 2,000       2,000  
Stock-based compensation - stock options, RSAs, RSUs 6,493       6,493  
Net loss (34,946)         (34,946)
Ending balance (in shares) at Dec. 31, 2024   2,780,597   2,780,597    
Ending balance at Dec. 31, 2024 $ (7,810)     $ 0 $ 400,183 $ (407,993)