Significant Customers (Details Textual)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenues attributable to sales [Line Items]
Total	50.30%	64.40%	68.40%
Telvent [Member] | Grid [Member]
Revenues attributable to sales [Line Items]
Total	14.30%	29.70%	15.70%
Ebv Avnet [Member] | IIoT [Member]
Revenues attributable to sales [Line Items]
Total	14.20%	8.10%	9.50%
Enel [Member] | IIoT [Member]
Revenues attributable to sales [Line Items]
Total	13.70%	4.80%	4.50%
Duke [Member] | Grid [Member]
Revenues attributable to sales [Line Items]
Total	5.80%	13.70%	27.20%
Eltel [Member] | Grid [Member]
Revenues attributable to sales [Line Items]
Total	2.30%	8.10%	11.50%