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Summary of Significant Accounting Policies (Tables)
6 Months Ended
Jun. 30, 2020
Summary of Significant Accounting Policies [Abstract]  
Inventories
Inventories consist of the following (U.S. dollars in thousands):

 
June 30,
2020
   
December 31,
2019
 
Raw materials
 
$
92,460
   
$
87,942
 
Finished goods
   
169,509
     
187,949
 
Total Inventory, net
 
$
261,969
   
$
275,891