Income Taxes - Reconciliation of the provision for income taxes to income taxes computed (Details) (USD $)	12 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Mar. 31, 2012
Income Tax Disclosure [Abstract]
Tax expense at federal statutory rate	$ 106,374	[1]	$ (70,678)	[1]	$ 102,691	[1]
Statutory depletion carryforward	(127,204)				(155,734)
Effect of graduated rates	(13,841)		3,391		(16,940)
Revision of prior year estimates					4,314
Permanent differences	46,421		35,783		30,210
Other					7,499
Total income tax expense (benefit)	$ 11,750		$ (31,504)		$ (27,960)
Effective income tax rate	4.00%		(15.00%)		(9.00%)

[1] The federal statutory rate was 34% for fiscal years ending March 31, 2014, 2013 and 2012.