Significant Customers (Tables)
 12 Months Ended
Dec. 31, 2013
Risks and Uncertainties [Abstract]  
Revenues attributable to sales to major customers
For the years ended December 31, 2013, 2012 and 2011 the percentage of the Company’s revenues attributable to sales made to these customers was as follows:
 
Segment
 
Year ended 31 December
 
 
 
2013
 
2012
 
2011
Telvent
Grid
 
14.3%
 
29.7%
 
15.7%
EBV/Avnet
IIoT
 
14.2%
 
8.1%
 
9.5%
Enel
IIoT
 
13.7%
 
4.8%
 
4.5%
Duke
Grid
 
5.8%
 
13.7%
 
27.2%
Eltel
Grid
 
2.3%
 
8.1%
 
11.5%
Total
 
 
50.3%
 
64.4%
 
68.4%