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PROPERTY AND EQUIPMENT
 12 Months Ended
Dec. 31, 2020
Property, Plant and Equipment [Abstract]  
PROPERTY AND EQUIPMENT
NOTE 4 — PROPERTY AND EQUIPMENT

 
  
December 31
  
 
  
2019
    
2020
  
Cost:
            
Laboratory equipment
  
$
3,242
    
$
3,644
  
Office equipment and furniture
    
265
      
265
  
Computers and software
    
490
      
530
  
Leasehold improvements
    
1,946
      
1,953
  
     
5,943
      
6,392
  
Less:
                
Accumulated depreciation and amortization
    
(3,629
)
    
(4,575
)
Property and equipment, net
  
$
2,314
    
$
1,817
  

Depreciation and amortization expense totaled $762, $887 and 946$ for the years ended December 31, 2018, 2019 and 2020, respectively.