Organization and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of significant concentration risk

The following table identifies customers from whom the Company derived 10% or more of its oil and gas revenues during the years presented. Based on the availability of other customers, the Company does not believe the loss of any of these customers would have a significant effect on its business or financial condition.

	Year Ended December 31,
	2015	2014	2013
Laclede Energy	21%	24%	14%
Shell Trading Co.	18%	30%	35%
Unimark, LLC	17%	14%	14%
BG Group	10%	(a)	(a)

(a) Less than 10 percent