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Property and Equipment, Net
 12 Months Ended
Dec. 31, 2021
Property, Plant and Equipment [Abstract]  
Property and Equipment
NOTE 4 - PROPERTY AND EQUIPMENT, NET:
 
    
December 31
  
    
    2021    
     
    2020    
  
    
 
 
     
 
 
  
    
U.S. dollars in thousands
  
Cost:
                  
Electronic and laboratory equipment
      4,045        3,779  
Furniture and office equipment
      407        404  
Leasehold improvements
      657        427  
Production equipment
      308        181  
Computers and software
      2,697        1,836  
    
 
 
     
 
 
  
       8,114        6,627  
Less: accumulated depreciation
      (5,373 )       (4,274 ) 
    
 
 
     
 
 
  
Property and equipment, net
      2,741        2,353  
    
 
 
     
 
 
  
Depreciation expenses were $1,099 thousand, $1,093 thousand and $1,038 thousand for the years ended December 31, 2021, 2020 and 2019, respectively. During the years ended December 31, 2021, 2020 and 2019, there were no impairments of property and equipment.