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Property, Plant and Equipment, Net (Tables)
12 Months Ended
Dec. 31, 2018
Property, Plant and Equipment, Net [Abstract]  
Schedule of Property, Plant and Equipment, Net
December 31,
 
   
2018
   
2017
 
 
U.S. Dollars (in thousands)
 
Cost:
           
Land
   
863
     
863
 
Building
   
14,099
     
13,307
 
Machinery and equipment
   
7,331
     
6,406
 
Office furniture and equipment
   
624
     
758
 
Computer equipment and software
   
4,383
     
4,310
 
Automobiles
   
87
     
87
 
Leasehold improvements
   
622
     
353
 
     
28,009
     
26,084
 
                 
Less accumulated depreciation
   
10,892
     
10,581
 
                 
     
17,117
     
15,503