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Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Total
March 2023 PIPE [Member]
Common Stock [Member]
Common Stock [Member]
August 2022 Pre-Funded Warrants [Member]
Common Stock [Member]
March 2023 Pre-Funded Warrants [Member]
Common Stock [Member]
March 2023 PIPE [Member]
Additional Paid-In Capital [Member]
Additional Paid-In Capital [Member]
March 2023 PIPE [Member]
Accumulated Deficit [Member]
Accumulated Other Comprehensive Income [Member]
Non-Controlling Interest [Member]
Stockholders Equity, Beginning Balance at Dec. 31, 2022 $ 20,900   $ 65       $ 278,827   $ (257,859)   $ (133)
Stockholders Equity, Beginning Balance, Shares at Dec. 31, 2022     616,079                
Issuance of shares related to Pre-Funded Warrants exercise (482,647)     56,813 425,834            
Modification of warrants related to March 2023 PIPE   $ 219           $ 219      
Unrealized gains on available-for-sale securities $ 101                 $ 101  
Issuance of shares   $ 4,740           $ 4,740      
Issuance of shares, Shares           165,500          
Issuance of shares related to employee stock purchase plan 12           12        
Issuance of shares related to employee stock purchase plan, Shares     1,993                
Issuance of shares related to reverse stock split, Shares     19,118                
Stock-based compensation 717           717        
Net loss (13,986)               (13,981)   (5)
Stockholders Equity, Ending Balance at Dec. 31, 2023 $ 12,703   $ 65       284,515   (271,840) 101 (138)
Stockholders Equity, Ending Balance, Shares at Dec. 31, 2023     1,285,337                
Issuance of shares related to Pre-Funded Warrants exercise (75,000)       75,000            
Unrealized gains on available-for-sale securities $ (101)                 $ (101)  
Issuance of shares related to employee stock purchase plan $ 9           9        
Issuance of shares related to employee stock purchase plan, Shares     4,603                
Issuance of shares related to reverse stock split, Shares 19,118                    
Stock-based compensation $ 512           512        
Write-down of non-controlling interest 138                   $ 138
Net loss (7,038)               (7,038)    
Stockholders Equity, Ending Balance at Dec. 31, 2024 $ 6,223   $ 65       $ 285,036   $ (278,878)    
Stockholders Equity, Ending Balance, Shares at Dec. 31, 2024     1,364,940