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Other Current Liabilities (Tables)
 12 Months Ended
Dec. 31, 2021
Other Liabilities Disclosure [Abstract]  
Schedule of Other Current Liabilities
    
December 31
  
    
    2021    
     
    2020    
  
    
 
 
     
 
 
  
    
U.S. dollars in thousands
  
Accrued vacation
      3,464        2,989  
Taxes payable
      40        37  
Accrued expenses- related party
      142        —    
Accrued expenses - other
      2,977        2,401  
    
 
 
     
 
 
  
       6,623        5,427