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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Preferred Stock [Member]
Series B [Member]
Preferred Stock [Member]
Series C [Member]
Preferred Stock [Member]
Series D [Member]
Preferred Stock [Member]
Series E [Member]
Common Stock [Member]
Common Stock [Member]
Series C [Member]
Common Stock [Member]
Series D [Member]
Additional Paid-in Capital [Member]
Additional Paid-in Capital [Member]
Series C [Member]
Additional Paid-in Capital [Member]
Series D [Member]
Additional Paid-in Capital [Member]
Series E [Member]
Accumulated Deficit [Member]
Accumulated Deficit [Member]
Series C [Member]
Accumulated Deficit [Member]
Series D [Member]
Accumulated Deficit [Member]
Series E [Member]
Total
Series C [Member]
Series D [Member]
Series E [Member]
Balance at Dec. 31, 2021 $ 5 $ 0 $ 0 $ 0 $ 0     $ 48,079       $ 65       $ 48,149      
Balance (in shares) at Dec. 31, 2021 500,000 10,000 0 0 44,101                            
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                      
Net loss $ 0 $ 0 $ 0 $ 0 $ 0     0       (326)       (326)      
Issuance of 15,571,429 units (comprising from common stock or prefunded warrants and warrants) and 628,751 warrants at primary offering, net of issuance costs (Note 7(a))         $ 1     10,694       0       10,695      
Issuance of 15,571,429 units (comprising from common stock or prefunded warrants and warrants) and 628,751 warrants at primary offering, net of issuance costs (Note 7(a)) (in shares)         65,357                            
Issuance of 6,407 shares of common stock upon exercise of underwriters' over-allotment option and exercise of 2,430,000 Class A warrants (Note 7(a))         $ 0     898       0       898      
Issuance of 6,407 shares of common stock upon exercise of underwriters' over-allotment option and exercise of 2,430,000 Class A warrants (Note 7(a)) (in shares)         6,407                            
Issuance of stock     $ 0             $ 17,600       $ 0       $ 17,600  
Issuance of stock (in shares)     25,000   6,407                            
Issuance of common stock following exercise of warrants         $ 0     3,143       0       3,143      
Issuance of common stock following exercise of warrants (in shares)         33,280                            
Preferred Stock redemption and issuance of common stock     $ 0       $ 4     130       (134)       0  
Preferred Stock redemption and issuance of common stock (in shares)             360,055                        
Preferred Stock redemption and issuance of common stock (in shares)     (15,828)                                
Compensation cost under the Equity Incentive Plan (Note 7(c))   $ 0       $ 0     $ 568       $ 0       $ 568    
Compensation cost under the Equity Incentive Plan (Note 7(c)) (in shares)   0                                  
Dividends declared ($10 per share of common stock and Class A warrant) (Note 7(b))         $ 0     (1,767)       (448)       (2,215)      
Dividends declared and paid ($2 per share of common stock and Class A warrant) (Note 7(b))         0     0       (886)       (886)      
Dividends declared and paid on Preferred Stock (Note 7(c))   $ 0 $ 0             0     (475) (117)     (950) (117)  
Dividends declared and paid on Preferred Stock (Note 7(c))                 (475)                    
Balance at Dec. 31, 2022 $ 5 $ 0 $ 0 $ 0 $ 5     78,870       (2,321)       76,559      
Balance (in shares) at Dec. 31, 2022 500,000 10,000 9,172 0 509,200                            
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                      
Net loss $ 0 $ 0 $ 0 $ 0 $ 0     0       (1,977)       (1,977)      
Issuance of stock     $ 0 $ 0           10,000 $ 35     0 $ 0     10,000 $ 35
Issuance of stock (in shares)     13,157 1,200 615,000                            
Issuance of common stock following exercise of warrants         $ 1     26       0       27      
Issuance of common stock following exercise of warrants (in shares)         135,000                            
Issuance of 15,000,000 units (comprising from 615,000 shares of common stock, 2,700,000 prefunded warrants and 15,000,000 Class B warrants) at primary offering, net of issuance costs (the "February 2023 Registered Direct Offering") (Note 7(a))         $ 6     6,693       0       6,699      
Issuance of 15,000,000 units (comprising from 615,000 shares of common stock, 2,700,000 prefunded warrants and 15,000,000 Class B warrants) at primary offering, net of issuance costs (the "February 2023 Registered Direct Offering") (Note 7(a)) (in shares)         615,000                            
Retirement of fractional common shares in June reverse stock split (Note 7(a))         $ 0     0       0       0      
Retirement of fractional common shares in June reverse stock split (Note 7(a)) (in shares)         (65)                            
Preferred Stock redemption and issuance of common stock   $ 0 $ 0   $ 20 $ 36   134 2,513     (154) (2,549)     0 0    
Preferred Stock redemption and issuance of common stock (in shares)           3,649,474 1,977,491                        
Preferred Stock redemption and issuance of common stock (in shares)   (9,793) (8,591)                                
Compensation cost under the Equity Incentive Plan (Note 7(c))   $ 0       $ 0     1,893       0       1,893    
Compensation cost under the Equity Incentive Plan (Note 7(c)) (in shares)   5,314                                  
Alternative cashless exercise of private placement warrants (Note 7(b))         $ 6     1,276       0       1,282      
Alternative cashless exercise of private placement warrants (Note 7(b)) (in shares)         562,501                            
Dividends declared and paid on Preferred Stock (Note 7(c))   $ 0 $ 0                   (306) (713)     (991) (968)  
Dividends declared and paid on Preferred Stock (Note 7(c))                 (685) (255)                  
Balance at Dec. 31, 2023 $ 5 $ 0 $ 0 $ 0 $ 74     100,500       (8,020)       92,559      
Balance (in shares) at Dec. 31, 2023 500,000 5,521 13,738 1,200 7,448,601                            
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                      
Net loss $ 0 $ 0 $ 0 $ 0 $ 0     0       (17,862)       (17,862)      
Issuance of stock     $ 0             8,600       0       8,600  
Issuance of stock (in shares)     9,442 0                              
Preferred Stock redemption and issuance of common stock     $ 0 $ 0     $ 1     25       (26)       $ 0  
Preferred Stock redemption and issuance of common stock (in shares)         56,381                            
Preferred Stock redemption and issuance of common stock (in shares)     (97) 0                           (97)  
Compensation cost under the Equity Incentive Plan (Note 7(c))   $ 0       $ 0     2,776       0       2,776    
Compensation cost under the Equity Incentive Plan (Note 7(c)) (in shares)   3,332                                  
Dividends declared and paid on Preferred Stock (Note 7(c))   $ 0 $ 0                   $ 0 $ 0     $ (681) $ (1,022)  
Dividends declared and paid on Preferred Stock (Note 7(c))                 $ (681) $ (1,022)                  
Balance at Dec. 31, 2024 $ 5 $ 0 $ 0 $ 0 $ 75     $ 110,198       $ (25,908)       $ 84,370      
Balance (in shares) at Dec. 31, 2024 500,000 8,853 23,083 1,200 7,504,982