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Accrued Expenses and Other Current Liabilities (Tables)
3 Months Ended 12 Months Ended
Mar. 31, 2024
Dec. 31, 2023
Accrued Liabilities, Current [Abstract]    
Schedule of Accrued Expenses and Other Current Liabilities
    
Three months
ended March

31, 2024
    
Year-ended

December 31,
2023
 
Accrued professional fees
   $ 315      $ 275  
Accrued GEM facility commitment fee
     4,000        4,000  
Accrued contingency fee
     187        199  
Accrued wages and benefits
     1,534        1,298  
Other accrued expenses and other current liabilities
     478        515  
  
 
 
    
 
 
 
Total accrued expenses and other current liabilities
   $ 6,514      $ 6,287  
  
 
 
    
 
 
 
    
December 31,
2023
    
December 31,
2022
 
Accrued legal
   $ —       $ 2,198  
Accrued professional fees
     275        460  
Accrued GEM facility commitment fee
     4,000        —   
Accrued contingency fee
     199        —   
Accrued wages and benefits
     1,298        250  
Other accrued expenses and other current liabilities
     515        267  
  
 
 
    
 
 
 
Total accrued expenses and other current liabilities
   $ 6,287      $ 3,175