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ENTITY-WIDE DISCLOSURE (Tables)
 12 Months Ended
Dec. 31, 2016
Risks and Uncertainties [Abstract]  
Schedule of total revenues based on the country and revenues from major customers that amount to 10% or more of total revenues
     
Year ended December 31,
  
     
2016
    
2015
    
2014
  
     
U.S. dollars in thousands
  
North America, mainly USA
         154,858           111,334           77,680    
Japan
         4,583           7,234           2,476    
South Korea
         21,457           16,265           3,293    
Germany
         23,047           11,229           3,237    
Sweden
         29,041           28,541           16,356    
United Kingdom
         42,252           31,402           20,404    
EUROPE – other
         6,587           6,471           3,380    
Israel
         57,950           20,533           12,512    
APAC – other
         16,718           5,790           2,706    
South America
         1,288           1,867           1,267    
Africa
         381           206           326    
          358,162           240,872           143,637    
 
​ ​ ​
Year ended December 31,
 ​
​ ​ ​
2016
 ​ ​
2015
 ​ ​
2014
 ​
​ ​ ​
U.S. dollars in thousands
 ​
Revenues from major customers
 ​ ​ ​ ​ 189,197 ​ ​ ​ ​ ​ 139,975 ​ ​ ​ ​ ​ 103,713 ​ ​
Percent of total revenues
 ​ ​ ​ ​
Customer A
 ​ ​ ​ ​ 30% ​ ​ ​ ​ ​ 31% ​ ​ ​ ​ ​ 33% ​ ​
Customer B
 ​ ​ ​ ​ 15% ​ ​ ​ ​ ​ 15% ​ ​ ​ ​ ​ 23% ​ ​
Customer C
 ​ ​ ​ ​ * ​ ​ ​ ​ ​ 12% ​ ​ ​ ​ ​ 11% ​ ​
​
*
Less than 10%.