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Significant Customers (Tables)
 12 Months Ended
Dec. 31, 2012
Risks and Uncertainties [Abstract]  
Revenues attributable to sales to major customers
For the years ended December 31, 2012, 2011 and 2010 the percentage of the Company’s revenues attributable to sales made to these customers was as follows:
 
Year ended 31 December
 
2012
 
2011
 
2010
Telvent
29.7
%
 
15.7
%
 
2.8
%
Duke
13.7
%
 
27.2
%
 
6.3
%
Eltel
8.1
%
 
11.5
%
 
28.5
%
EBV/Avnet
8.1
%
 
9.5
%
 
12.8
%
Total
59.6
%
 
63.9
%
 
50.4
%