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LEASES (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Apr. 30, 2023
Leases        
Right-of-use assets $ 1,945   $ 2,025  
Lease liability 2,060      
Lease cost        
Operating lease cost 149 $ 10    
Short-term lease cost 8 20    
Variable lease cost 60 6    
Total lease cost 217 36    
Operating cash outflows from operating leases $ 143 $ 10    
Weighted average remaining lease term 4 years 4 months 24 days   4 years 8 months 12 days  
Weighted average discount rate     13.10%  
Menlo Park, California Office Lease        
Leases        
Right-of-use assets $ 1,945,000     $ 2,154,000
Lease liability $ 2,060,000     $ 2,133,000
Lease cost        
Remaining lease term 4 years 4 months 24 days