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Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - 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   $ 4,740           $ 4,740      
Issuance of shares, Shares           165,500          
Modification of warrants related to March 2023 PIPE   $ 219           $ 219      
Issuance of shares related to Pre-Funded Warrants exercise (482,647)     56,813              
Issuance of shares related to employee stock purchase plan $ 5           5        
Issuance of shares related to employee stock purchase plan, Shares     88                
Issuance of shares related to reverse stock split     19,092                
Stock-based compensation 212           212        
Net loss (9,384)               (9,384)    
Stockholders Equity, Ending Balance at Mar. 31, 2023 16,692   $ 65       284,003   (267,243)   (133)
Stockholders Equity, Ending Balance, Shares at Mar. 31, 2023     857,572                
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                
Net loss (14,000)                    
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            
Issuance of shares related to employee stock purchase plan $ 5           5        
Issuance of shares related to employee stock purchase plan, Shares     2,503                
Issuance of shares related to reverse stock split 19,118                    
Stock-based compensation $ 138           138        
Unrealized gains on available-for-sale securities 60                 60  
Net loss (2,423)               (2,423)    
Stockholders Equity, Ending Balance at Mar. 31, 2024 $ 10,483   $ 65       $ 284,658   $ (274,263) $ 161 $ (138)
Stockholders Equity, Ending Balance, Shares at Mar. 31, 2024     1,362,840