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Property and Equipment, Net (Tables)
12 Months Ended
Dec. 31, 2020
Property, Plant and Equipment [Abstract]  
Schedule of property and equipment
   December 31, 
   2020   2019 
   (U.S. Dollars
in thousands)
 
         
Office furniture and lab equipment   820    325 
Computers and electronic equipment   151    39 
Machinery   1,762    - 
Leasehold improvement   16    - 
Land – See b below   6,297    - 
Prepayments on account of production line in construction - See b below   5,318    - 
    14,364    364 
Less: accumulated depreciation   (344)   (136)
Total property and equipment, net   14,020    228