Basis of Presentation and Revenue Recognition (Tables)

9 Months Ended

Sep. 30, 2013

Basis of Presentation and Revenue Recognition [Abstract]

Percentage of revenue by major customers

For the three and nine months ended September 30, 2013 and 2012, the following customers have provided more than 10% of the Company's consolidated revenue:

	Three Months ended September 30,		Nine Months ended September 30,
	2013	2012	2013	2012
Slovenské elektrárne, a.s.	31.1%	2.3%	25.6%	4.8%
BP Products North America	0.5%	15.6%	0.6%	6.2%