Summary of Significant Accounting Policies Concentration of Credit Risk (Details)	Dec. 31, 2013	Dec. 31, 2012
Percentage of accounts receivable total	55.80%	66.00%
Telvent [Member]
Percentage of accounts receivable	15.30%	46.10%
Enel [Member] [Member]
Percentage of accounts receivable	14.30%	9.40%
Eltel [Member]
Percentage of accounts receivable	10.10%	1.30%
Ebv Avnet [Member]
Percentage of accounts receivable	8.60%	9.20%
Duke [Member]
Percentage of accounts receivable	7.50%	0.00%