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Property and Equipment
 12 Months Ended
Dec. 31, 2021
Property, Plant and Equipment [Abstract]  
Property and Equipment
6.
Property and Equipment
Property and equipment consisted of the following as of December 31, 2021 and 2020 (in thousands):
 
    
December 31
  
    
2021
     
2020
  
Computers & equipment
    $ 77      $ 77  
Furniture
      118        118  
Leasehold improvements
      48        48  
Construction in progress
      689        691  
    
 
 
     
 
 
  
Property and equipment, gross
      932        934  
Less: Accumulated depreciation
      (127 )       (88 ) 
    
 
 
     
 
 
  
Property and equipment,
net
    $ 805      $ 846  
Depreciation expense
 
for each of the years ended December 
31
,
2021
,
2020
and
2019
was $
39
 thousand, $
40
 thousand and $
40
 thousand, respectively.