- Roll Forward of Changes in Standardized Measure of Discount Future Cash Flows on Proved Crude Oil, Natural Gas Liquids, and Natural Gas Reserves (Details) - USD ($)		12 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Changes in the standardized measure of discounted future net cash flows applicable to proved crude oil, natural gas liquids, and natural gas reserves
Balance, beginning of year		$ 226,077,672	$ 307,220,699	$ 283,597,493
Net changes in sales prices and production costs related to future production		(88,043,095)	(73,439,526)	(35,184,725)
Changes in estimated future development costs		(9,585,405)	9,848,614	(566,125)
Sales of oil and gas produced during the period, net of production costs		(18,538,016)	(16,479,934)	(19,569,182)
Net change due to extensions, discoveries, and improved recovery		0	775,574	0
Net change due to revisions in quantity estimates		(9,391,321)	(23,757,788)	64,817,544
Net change due to sales of minerals in place		0	(3,150,277)	(34,119,027)
Development costs incurred during the period		7,785,095	0	747,656
Accretion of discount		31,974,540	45,896,187	41,678,733
Net change in discounted income taxes		34,157,767	58,073,450	10,175,957
Net changes in timing of production and other	[1]	(15,240,698)	(78,909,327)	(4,357,625)
Balance, end of year		$ 159,196,539	$ 226,077,672	$ 307,220,699

[1] Due to the June 2013 adverse fluid release event in the Delhi Field, the operator had expressed plans to produce the Delhi Field at lower production rates. The decision to produce these reserves at lower rates over a longer period of time did not materially change the total quantities expected to be recovered, but resulted in a significant reduction in the discounted value of these reserves as of June 30, 2014.