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Consolidated Statements Convertible Preferred Stock and Stockholders' Equity - USD ($)
$ in Thousands
Total
Warrant Inducement Agreements [Member]
September 2023 Offering [Member]
April 2023 Offering [Member]
May 2024 Offering [Member]
December 2024 Offering [Member]
January 2023 Offering [Member]
Preferred Stock [Member]
Common Stock [Member]
Common Stock [Member]
Warrant Inducement Agreements [Member]
Common Stock [Member]
September 2023 Offering [Member]
Common Stock [Member]
April 2023 Offering [Member]
Common Stock [Member]
May 2024 Offering [Member]
Common Stock [Member]
December 2024 Offering [Member]
Common Stock [Member]
January 2023 Offering [Member]
Additional Paid-in Capital [Member]
 [1]
Additional Paid-in Capital [Member]
Warrant Inducement Agreements [Member]
 [1]
Additional Paid-in Capital [Member]
September 2023 Offering [Member]
 [1]
Additional Paid-in Capital [Member]
April 2023 Offering [Member]
 [1]
Additional Paid-in Capital [Member]
May 2024 Offering [Member]
 [1]
Additional Paid-in Capital [Member]
December 2024 Offering [Member]
 [1]
Additional Paid-in Capital [Member]
January 2023 Offering [Member]
 [1]
Retained Earnings [Member]
Balance (in shares) at Dec. 31, 2022               200,000 196,287 [1]                            
Balance at Dec. 31, 2022 $ 12,479             $ 2 $ 2 [1]             $ 121,665             $ (109,190)
Net loss (12,300)                                           (12,300)
Issuance of common stock for employee stock purchase plan (shares) [1]                 2,245                            
Issuance of common stock for employee stock purchase plan 17                             17              
Stock-based compensation expense and related charges 624                             624              
Issuance of common stock upon warrant exercises (in shares) [1]                 146,932                            
Issuance of common stock upon warrant exercises 1,350               $ 1 [1]             1,349              
Issuance of common stock for vesting of restricted stock units, net of employee withholding tax liability (in shares) [1]                 4,074                            
Issuance of common stock warrants related to promissory note (in shares) [1]                     155,959 80,770     31,789                
Issuance of common stock warrants related to promissory note     $ 1,676 $ 5,301     $ 2,166       $ 2 [1] $ 1 [1]           $ 1,674 $ 5,300     $ 2,166  
Adjustment to record the impact of exercise price reset on outstanding warrants related to down round provisions (16)                             16             (16)
Balance (in shares) at Dec. 31, 2023               200,000 618,056 [1]                            
Balance at Dec. 31, 2023 11,313             $ 2 $ 6 [1]             132,811             (121,506)
Net loss (14,438)                                           (14,438)
Issuance of common stock for employee stock purchase plan (shares) [1]                 2,256                            
Issuance of common stock for employee stock purchase plan 11                             11              
Issuance of common stock to vendor (in shares) [1]                 32,632                            
Issuance of common stock to vendor 135                             135              
Stock-based compensation expense and related charges 652                             652              
Issuance of common stock upon warrant exercises (in shares) [1]                 1,626,496                            
Issuance of common stock upon warrant exercises 3               $ 16 [1]             (13)              
Issuance of common stock for vesting of restricted stock units, net of employee withholding tax liability (in shares) [1]                 18,046                            
Issuance of common stock for vesting of restricted stock units, net of employee withholding tax liability (25)                             (25)              
Issuance of common stock warrants related to promissory note (in shares) [1]                   228,162     85,100 158,000                  
Issuance of common stock warrants related to promissory note   $ 2,160     $ 3,544 $ 4,137       $ 2 [1]     $ 1 [1] $ 2 [1]     $ 2,158     $ 3,543 $ 4,135    
Reverse stock split fractional share settlement [1]                 (102)                            
Adjustment to record the impact of exercise price reset on outstanding warrants related to down round provisions 0                                            
Balance (in shares) at Dec. 31, 2024               200,000 2,768,646 [1]                            
Balance at Dec. 31, 2024 $ 7,492             $ 2 $ 27 [1]             $ 143,407             $ (135,944)
[1]

(*) Adjusted to reflect the 1-for-15 reverse stock split effected on April 5, 2024.