Income Taxes - Reconciliation of Provision for Income Taxes to Income Taxes Computed (Details) - USD ($)		12 Months Ended
		Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Tax expense at federal statutory rate (1)	[1]	$ (236,148)	$ (1,577,789)	$ (183,085)
Statutory depletion carryforward		(67,801)	(35,034)	(71,292)
Change in valuation allowance		289,456	848,964
Effect of rate change			64,585	12,221
Permanent differences		14,497	31,904	44,657
Other		(4)	6,500
Total income tax benefit			$ (660,870)	$ (197,499)
Effective income tax rate		0.00%	(14.00%)	(37.00%)

[1] The federal statutory rate was 34% for fiscal years ending March 31, 2017, 2016 and 2015.