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Consolidated Statements of Stockholders' (Deficit) Equity - USD ($)
$ in Thousands
Preferred Stock [Member]
Conversion of Series B Preferred Stock to Common Stock [Member]
Preferred Stock [Member]
Conversion of Series C Preferred Stock to Common Stock [Member]
Preferred Stock [Member]
Series B Preferred Stock [Member]
Preferred Stock [Member]
Series C Preferred Stock [Member]
Preferred Stock [Member]
May 2023 Warrants [Member]
Preferred Stock [Member]
The 2023 Warrant Reprice Transaction [Member]
Preferred Stock [Member]
The 2024 Warrant Reprice Transaction [Member]
Preferred Stock [Member]
The December 2023 Warrants [Member]
Preferred Stock [Member]
March 2024 Warrant [Member]
Preferred Stock [Member]
Employees and Directors [Member]
Preferred Stock [Member]
Common Stock [Member]
Conversion of Series B Preferred Stock to Common Stock [Member]
Common Stock [Member]
Conversion of Series C Preferred Stock to Common Stock [Member]
Common Stock [Member]
Series B Preferred Stock [Member]
Common Stock [Member]
Series C Preferred Stock [Member]
Common Stock [Member]
May 2023 Warrants [Member]
Common Stock [Member]
The 2023 Warrant Reprice Transaction [Member]
Common Stock [Member]
The 2024 Warrant Reprice Transaction [Member]
Common Stock [Member]
The December 2023 Warrants [Member]
Common Stock [Member]
March 2024 Warrant [Member]
Common Stock [Member]
Prefunded Warrants 2024 Public Offering [Member]
Common Stock [Member]
Employees and Directors [Member]
Common Stock [Member]
The 2024 Public Offering [Member]
Common Stock [Member]
Additional Paid-in Capital [Member]
Conversion of Series B Preferred Stock to Common Stock [Member]
Additional Paid-in Capital [Member]
Conversion of Series C Preferred Stock to Common Stock [Member]
Additional Paid-in Capital [Member]
Series B Preferred Stock [Member]
Additional Paid-in Capital [Member]
Series C Preferred Stock [Member]
Additional Paid-in Capital [Member]
May 2023 Warrants [Member]
Additional Paid-in Capital [Member]
The 2023 Warrant Reprice Transaction [Member]
Additional Paid-in Capital [Member]
The 2024 Warrant Reprice Transaction [Member]
Additional Paid-in Capital [Member]
The December 2023 Warrants [Member]
Additional Paid-in Capital [Member]
March 2024 Warrant [Member]
Additional Paid-in Capital [Member]
Prefunded Warrants 2024 Public Offering [Member]
Additional Paid-in Capital [Member]
Employees and Directors [Member]
Additional Paid-in Capital [Member]
The 2024 Public Offering [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Conversion of Series B Preferred Stock to Common Stock [Member]
Retained Earnings [Member]
Conversion of Series C Preferred Stock to Common Stock [Member]
Retained Earnings [Member]
Series B Preferred Stock [Member]
Retained Earnings [Member]
Series C Preferred Stock [Member]
Retained Earnings [Member]
May 2023 Warrants [Member]
Retained Earnings [Member]
The 2023 Warrant Reprice Transaction [Member]
Retained Earnings [Member]
The 2024 Warrant Reprice Transaction [Member]
Retained Earnings [Member]
The December 2023 Warrants [Member]
Retained Earnings [Member]
March 2024 Warrant [Member]
Retained Earnings [Member]
Prefunded Warrants 2024 Public Offering [Member]
Retained Earnings [Member]
Employees and Directors [Member]
Retained Earnings [Member]
Conversion of Series B Preferred Stock to Common Stock [Member]
Conversion of Series C Preferred Stock to Common Stock [Member]
Series B Preferred Stock [Member]
Series C Preferred Stock [Member]
May 2023 Warrants [Member]
The 2023 Warrant Reprice Transaction [Member]
The 2024 Warrant Reprice Transaction [Member]
The December 2023 Warrants [Member]
March 2024 Warrant [Member]
Prefunded Warrants 2024 Public Offering [Member]
Employees and Directors [Member]
The 2024 Public Offering [Member]
Total
Balance (in shares) at Dec. 31, 2022                     14,000                         58,000                                                                            
Balance at Dec. 31, 2022                     $ 2,973                         $ 1                         $ 165,732                       $ (158,152)                         $ 10,554
Net loss                     0                         0                         0                       (9,640)                         (9,640)
Conversion of Preferred Stock to common stock (in shares) (6,000) (1,000)                   183,000 8,000                                                                                                  
Conversion of Preferred Stock to common stock $ (295) $ (728)                   $ 2 $ 0                       $ 293 $ 728                       $ 0 $ 0                     $ 0 $ 0                      
Adjustment of Preferred Stock conversion price     $ 0 $ 0                   $ 0 $ 0                       $ 6,385 $ 672                       $ (6,385) $ (672)                     $ 0 $ 0                  
Modification of common stock warrants                     $ 0                         $ 0                         479                       0                         479
Reclassification of May 2023 Warrants         $ 0                     $ 0                         $ 1,360                         $ 0                       $ 1,360                
Reclassification of embedded derivative liability                                                                         169                                                 169
Issuance of common stock in connection with Warrant Reprice Transaction, net (in shares)           0                     72,000                                                                                          
Issuance of common stock in connection with Warrant Reprice Transaction, net           $ 0                     $ 0                         $ 101                         $ 0                       $ 101              
Stock-based compensation expense related to employee and director stock awards                   $ 0                       $ 0                         $ 291                         $ 0                       $ 291    
Balance (in shares) at Dec. 31, 2023                     7,000                         321,000                                                                            
Balance at Dec. 31, 2023                     $ 1,950                         $ 3                         176,210                       (174,849)                         3,314
Net loss                     $ 0                         $ 0                         0                       (7,223)                         (7,223)
Conversion of Preferred Stock to common stock (in shares) (5,000) (1,000)                   625,000 205,000                                                                                                  
Conversion of Preferred Stock to common stock $ (268) $ (1,676)                   $ 6 $ 2                       $ 262 $ 1,674                       $ 0 $ 0                     $ 0 $ 0                      
Adjustment of Preferred Stock conversion price       $ 0                     $ 0                         $ 380                         $ (380)                       $ 0                  
Modification of common stock warrants             $ 0                     $ 0                         $ 69           1,005             $ 0         (1,005)             $ 69            
Reclassification of embedded derivative liability                                                                         242                                                 242
Issuance of common stock in connection with Warrant Reprice Transaction, net (in shares)             0                     90,000     2,042,000                                                                           2,041,814      
Issuance of common stock in connection with Warrant Reprice Transaction, net             $ 0                     $ 1     $ 21                   $ 129     $ 0                   $ 0     $ 0                 $ 130     $ 21      
Stock-based compensation expense related to employee and director stock awards                   $ 0                       $ 0                         $ 148                         $ 0                       $ 148    
Reclassification of Warrants from liability               $ 0 $ 0                   $ 0 $ 0                       $ 212 $ 100                       $ 0 $ 0                     $ 212 $ 100        
Shares issued for 35:1 reverse stock split due to rounding feature (in shares)                     0                         107,000                                                                            
Shares issued for 35:1 reverse stock split due to rounding feature                     $ 0                         $ 1                         (1)                       0                         0
Issuance of common stock and pre-funded warrants in the 2024 Public Offering, net of issuance cost (in shares)                                             1,495,000                                                                              
Issuance of common stock and pre-funded warrants in the 2024 Public Offering, net of issuance cost                                             $ 15                         $ 2,843                                                 $ 2,858  
Balance (in shares) at Dec. 31, 2024                     1,000                         4,885,000                                                                            
Balance at Dec. 31, 2024                     $ 6                         $ 49                         $ 183,273                       $ (183,457)                         $ (129)