Supplementary Information on Oil And Gas Producing Activities (Unaudited) - Summary of Principal Changes in the Aggregate Standardized Measure of Discounted Future Net Cash Flows (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Extractive Industries [Abstract]
Standardized Measure, Beginning of Year	$ 67,094,000	$ 44,314,000
Oil and gas sales, net of production costs	942,744	(14,625,871)
Changes in prices and future production	(75,829,003)	(1,676,515)
Extensions, discoveries and improved recovery, net of costs	157,123	40,301,999
Sales of Minerals in place-leaseholds	(2,398,466)	(3,433,255)
Change in estimated future development costs	913,657	(6,553,408)
Previously estimated development costs incurred	3,781,305
Revisions of previous quantity estimates	(7,451,741)	4,682,554
Accretion of Discount	6,709,400	4,431,400
Net change in income taxes	15,412,445	(7,071,933)
Timing and Other	483,400	6,725,029
Standardized Measure, End of Year	$ 9,814,864	$ 67,094,000