Income Taxes - Components of net deferred tax assets (Details) (USD $)	Mar. 31, 2014	Mar. 31, 2013
Deferred tax assets:
Percentage depletion carryforwards	$ 1,463,834	$ 1,336,630
Deferred stock-based compensation	29,475	24,003
Asset retirement obligation	298,089	252,158
Net operating loss	298,736	503,659
Derivative instruments	13,944
Other	9,673	3,237
Total deferred tax assets	2,113,751	2,119,687
Deferred tax liabilities:
Excess financial accounting bases over tax bases of property and equipment	(2,972,200)	(2,972,886)
Net deferred tax liabilities	$ (858,449)	$ (853,199)