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Consolidated Statement of Stockholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Common Stock
Public offering
Common Stock
Private Placement
Common Stock
Participation Right
Common Stock
Additional Paid-in Capital
Public offering
Additional Paid-in Capital
Private Placement
Additional Paid-in Capital
Participation Right
Additional Paid-in Capital
Accumulated Other Comprehensive Loss
Accumulated Deficit
Public offering
Private Placement
Participation Right
Total
Beginning Balance at Dec. 31, 2022       $ 4       $ 98,079 $ (8) $ (88,523)       $ 9,552
Beginning Balances (in shares) at Dec. 31, 2022       38,023                    
Share-based compensation               599           599
Share-based compensation (in shares)       339                    
Fair value of stock issued in payment of accrued compensation               234           234
Fair value of stock issued in payment of accrued compensation (in shares)       296                    
Shares issued for services ($0.66 per share)               7           7
Shares issued for services ($0.66 per share) (in shares)       12                    
Shares issued upon exercise of options ($0.54 per share) (in shares)       12                    
Shares issued for services ($0.81 per share)               3           3
Shares issued for services ($0.81 per share) (in shares)       3                    
Shares issued upon exercise of options ($1.31 per share)(in shares)       2                    
Foreign-exchange translation adjustment                 (9)         (9)
Net loss                   (5,194)       (5,194)
Ending Balance at Dec. 31, 2023       $ 4       98,922 (17) (93,717)       5,192
Ending Balances (in shares) at Dec. 31, 2023       38,687                    
Share-based compensation               528           528
Share-based compensation (in shares)       314                    
Fair value of stock issued in payment of accrued compensation               326           326
Fair value of stock issued in payment of accrued compensation (in shares)       307                    
Shares issued for services               29           29
Shares issued for services (per share) (in shares)       40                    
Issuance of common stock in offering, net of expenses $ 1       $ 2,390 $ 865         $ 2,391 $ 865    
Issuance of common stock in offering, net of expenses (in shares) 5,314 2,250                        
Issuance of warrants in offering, net of expenses         $ 1,831   $ 2,250 2,389     $ 1,831   $ 2,250 2,389
Issuance of common stock for participation right exercise, net of expenses             1,447           1,447  
Issuance of common stock for participation right exercise, net of expenses (in shares)     3,350                      
Issuance of prefunded warrants for participation right exercise, net of expenses           $ 1,214 $ 580         $ 1,214 $ 580  
Exercise of warrants (in shares)       24                    
Exercise of warrants               25           25
Foreign-exchange translation adjustment                 (4)         (4)
Net loss                   (5,299)       (5,299)
Ending Balance at Dec. 31, 2024       $ 5       $ 112,796 $ (21) $ (99,016)       $ 13,764
Ending Balances (in shares) at Dec. 31, 2024       50,286