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Fixed assets
 9 Months Ended
Sep. 30, 2023
Property, Plant and Equipment [Abstract]  
Fixed assets
4. Fixed assets
Our fixed assets, net consisted of the following as of September 30, 2023 and December 31, 2022 (in thousands):
 
     September 30, 2023      December 31, 2022  
Furniture and fixtures
    $ 931      $ 931  
Computer and office equipment
      1,167        1,168  
Computer software
      375        375  
Leasehold improvements
      49        49  
    
 
 
     
 
 
  
Fixed assets
      2,522        2,523  
Less: accumulated depreciation and amortization
      (2,503 )       (2,445 ) 
    
 
 
     
 
 
  
Fixed assets, net
    $ 19      $ 78  
    
 
 
     
 
 
  
We recorded, in continuing operations, depreciation expense of $0.0 million and $0.2 million for the three months ended September 30, 2023 and 2022, respectively, and depreciation expense of $0.0 million and $0.4 million for the nine months ended September 
30
, 2023 and 2022, respectively.