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Summary of Significant Accounting Policies (Tables)
9 Months Ended
Sep. 30, 2019
Summary of Significant Accounting Policies [Abstract]  
Inventories Inventories consist of the following (U.S. dollars in thousands):


 
September 30,
2019
   
December 31,
2018
 
             
Raw materials
 
$
89,026
   
$
91,610
 
Finished goods
   
193,971
     
204,211
 
Total Inventory, net
 
$
282,997
   
$
295,821