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Income Taxes (Details Narrative) (USD $) | 12 Months Ended |
--- | --- | ---
Mar. 31, 2013 | Mar. 31, 2012 | Mar. 31, 2011 | Mar. 31, 2010
Income Tax Disclosure [Abstract] |  |  |  |
Statutory depletion carryforward | $ 4,300,000 |  |  |
Net operating loss carryforward | 3,800,000 |  |  |
Expiration date, operating loss carryforward | 2021 |  |  |
Deferred income tax benefit (expense) | 31,504 | 27,960 | (9,906) |
Current income tax benefit |  |  | 25,502 |
Uncertain tax positions |  |  |  |
Unrecognized tax benefits at end of period | $ 677,000 | $ 677,000 | $ 670,000 | $ 524,000

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