Significant Customers (Details Textual)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Revenues attributable to sales [Line Items]
Total	45.30%	64.20%
Significant Customers (Textual) [Abstract]
Numbers of customers	5
Avnet [Member]
Revenues attributable to sales [Line Items]
Total	16.90%	12.70%
Enel [Member]
Revenues attributable to sales [Line Items]
Total	8.70%	7.50%
Ubitronix [Member]
Revenues attributable to sales [Line Items]
Total	8.30%	12.70%
Duke [Member]
Revenues attributable to sales [Line Items]
Total	6.90%	9.30%
Telvent [Member]
Revenues attributable to sales [Line Items]
Total	4.50%	22.00%