Organization and Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2015

Organization and Summary of Significant Accounting Policies [Abstract]

Schedule of Changes in Asset Retirement Obligations

	2015		2014
	(in thousands)
Balance, beginning of period	$	1,571	$	1,513
Liabilities incurred		36		19
Accretion expense		140		39
Revisions in estimated cash flows		778		-
Balance, end of period	$	2,525	$	1,571