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CONSOLIDATED STATEMENTS OF CHANGES IN REDEEMABLE CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY (DEFICIT) - USD ($)
$ in Thousands
Preferred Stock [Member]
Series A 12% Convertible Preferred Stock [Member]
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Deficit [Member]
Total
Beginning balance at Dec. 31, 2022         $ 1,723
Beginning balance (in shares) at Dec. 31, 2022         176
Ending balance at Dec. 31, 2023         $ 1,723
Ending balance (in shares) at Dec. 31, 2023         176
Beginning balance at Dec. 31, 2022 $ 510 $ 59 $ 275,081 $ (309,567) $ (33,917)
Beginning balance (in shares) at Dec. 31, 2022 1,260,000 59,426,005      
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Series A 12% convertible preferred stock dividend     50 (50)  
Series A 12% convertible preferred stock dividend (in shares)   25,200      
Series C super dividend redeemable convertible preferred stock dividend     70 (70)  
Series C super dividend redeemable convertible preferred stock dividend (in shares)   35,200      
Conversion of Series A Convertible Preferred to common $ (10)   10    
Conversion of Series A Convertible Preferred to common (in shares) (25,000) 4,257      
Issuance of common stock from exercise of warrants   $ 2 10,031   $ 10,033
Issuance of common stock from exercise of warrants (in shares)   2,236,204      
Issuance of common stock from exercise of stock options, net of shares withheld for exercise (in shares)         0
Issuance of common stock purchase warrants in connection with related party line of credit     671   $ 671
Warrant modification     3,619 (3,619)  
Stock-based compensation expense     2,315   2,315
Stock-based compensation expense (in shares)   126,048      
Net loss       (41,066) (41,066)
Ending balance at Dec. 31, 2023 $ 500 $ 61 291,847 (354,372) (61,964)
Ending balance (in shares) at Dec. 31, 2023 1,235,000 61,852,914      
Ending balance at Dec. 31, 2024         $ 1,723
Ending balance (in shares) at Dec. 31, 2024         176
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Series A 12% convertible preferred stock dividend     64 (64)  
Series A 12% convertible preferred stock dividend (in shares)   24,700      
Series C super dividend redeemable convertible preferred stock dividend     89 (89)  
Series C super dividend redeemable convertible preferred stock dividend (in shares)   35,200      
Issuance of common stock from exercise of warrants   $ 1 427   $ 428
Issuance of common stock from exercise of warrants (in shares)   142,370      
Issuance of common stock from exercise of stock options, net of shares withheld for exercise     799   $ 799
Issuance of common stock from exercise of stock options, net of shares withheld for exercise (in shares)   473,370     503,333
Issuance of common stock from restricted stock units (in shares)   378,000      
Issuance of common stock purchase warrants in connection with related party line of credit     845   $ 845
Stock-based compensation expense     2,146   2,146
Stock-based compensation expense (in shares)   250,548      
Net loss       (47,047) (47,047)
Ending balance at Dec. 31, 2024 $ 500 $ 62 $ 296,217 $ (401,572) $ (104,793)
Ending balance (in shares) at Dec. 31, 2024 1,235,000 63,157,235