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BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES- Basis of presentation (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Jun. 16, 2023
Jun. 15, 2023
Mar. 31, 2024
USD ($)
$ / shares
Mar. 31, 2023
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Revenue from External Customer [Line Items]            
Net loss     $ (418) $ (1,333) $ 4,300  
Cash used in operating activities     (58) (1,183) 2,400  
Stockholders' equity     3,225 $ 2,955 $ 3,051 $ (477)
Reverse stock split ratio 0.142857 0.142857        
Minimum            
Revenue from External Customer [Line Items]            
Stockholders' equity     $ 2,500      
Common stock, minimum bid price (in dollars per share) | $ / shares     $ 1.00      
Reverse stock split ratio   0.5