Basis of Presentation and Revenue Recognition (Tables)

6 Months Ended

Jun. 30, 2015

Basis of Presentation and Revenue Recognition [Abstract]

Percentage of revenue by major customers

For the three and six months ended June 30, 2015 and 2014, the following customers provided more than 10% of the Company's consolidated revenue:

	Three Months ended June 30,		Six Months ended June 30,
	2015	2014	2015	2014
Tennessee Valley Authority	18.7 %	0.0 %	19.9 %	0.0 %
Public Service Enterprise Group Inc.	11.7 %	0.6 %	10.2 %	0.6 %