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GOODWILL (Tables)
12 Months Ended
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill
The changes in the carrying amount of goodwill for the years ended December 31, 2016 and 2015 are as follows:
 
   
US dollars
 
   
Location based services
   
Wireless communications products
   
Total
 
(in thousands)
     
Balance as of January 1, 2016 (*)
   
1,539
     
1,817
     
3,356
 
Changes during 2016:
                       
Translation differences
   
23
     
27
     
50
 
Balance as of December 31, 2016
   
1,562
     
1,844
     
3,406
 
Changes during 2017:
                       
Translation differences
   
170
     
201
     
371
 
Balance as of December 31, 2017
   
1,732
     
2,045
     
3,777
 

(*)
The accumulated amount of goodwill impairment loss as of December 31, 2017, 2016 and 2015 was US$ 7,098,000.