Significant Customers (Tables)

3 Months Ended

Mar. 31, 2018

Risks and Uncertainties [Abstract]

Schedules of Concentration of Risk, by Risk Factor

The following table presents the percentage of total revenues generated by each of these customers:

	Three Months Ended March 31,
	2018		2017
HFC	79	%	84	%
Delek	5	%	8	%