Significant Customers (Details Textual)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues attributable to sales [Line Items]
Number of Customers	2
Total	33.90%	42.70%	14.00%
Ebv Avnet [Member]
Revenues attributable to sales [Line Items]
Total	26.20%	26.60%	9.50%
Enel [Member]
Revenues attributable to sales [Line Items]
Total	7.70%	16.10%	4.50%