Income Taxes - Reconciliation of Provision for Income Taxes to Income Taxes Computed (Details) - USD ($)		12 Months Ended
		Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Income Tax Disclosure [Abstract]
Tax expense at federal statutory rate	[1]	$ (1,577,789)	$ (183,085)	$ 106,374
Statutory depletion carryforward		(35,034)	$ (71,292)	$ (127,204)
Change in valuation allowance		848,964
Effect of graduated rates		64,585	$ 12,221	$ (13,841)
Permanent differences		31,904	$ 44,576	$ 46,421
Other		6,500
Total income tax (benefit) expense		$ (660,870)	$ (197,499)	$ 11,750
Effective income tax rate		(14.00%)	(37.00%)	4.00%

[1] The federal statutory rate was 34% for fiscal years ending March 31, 2016, 2015 and 2014