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Significant Customers
 12 Months Ended
Dec. 31, 2013
Risks and Uncertainties [Abstract]  
Significant Customers
7.    Significant Customers

The Company markets its products and services throughout the world to original equipment manufacturers (OEMs) and systems integrators in the building, industrial, transportation, utility/home, and other automation markets. During the years ended December 31, 2013, 2012 and 2011, the Company had five customers that accounted for a significant portion of its revenues: EBV Electronik GmbH and Avnet Europe Comm VA (“EBV/Avnet”), the Company’s primary distributors of its IIoT products in Europe, Duke Energy Corporation (“Duke”), a U.S. utility company; Enel Distribuzione Spa ("Enel"), an Italian utility company; and Eltel Networks A/S (“Eltel”) and Telvent Energia y Medioambiente SA (“Telvent”), value added resellers of the Company’s Grid products. 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%


In April 2011, the Company’s distributor agreement with EBV was assigned from EBV to Avnet Europe Comm VA, a limited partnership organized under the laws of Belgium (“Avnet”). Each of EBV and Avnet are indirect subsidiaries of Avnet, Inc., a New York corporation, which is a distributor of electronic parts, enterprise computing and storage products and embedded subsystems. At the time of the assignment, the term of the distributor agreement was extended and will now expire in June 2014.