Significant Customers (Details) - customer	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues attributable to sales [Line Items]
Number of Customers	2
Total	37.20%	33.90%	42.70%
Ebv Avnet [Member]
Revenues attributable to sales [Line Items]
Total	24.50%	26.20%	26.60%
Enel [Member]
Revenues attributable to sales [Line Items]
Total	12.70%	7.70%	16.10%