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Income Taxes - Income Taxes - Net Deferred Taxes in Balance Sheet (Details) (USD $) | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012
Deferred tax assets: |  |
Loss carryovers | $ 9,852,000 | $ 10,118,000
Deferred Gain | 2,335,000 | 1,253,000
Stock option compensation expense | 932,000 | 900,000
Royalty | 1,363,000 | 1,492,000
Earnings in Unconsolidated Subsidiary | 798,000 | 496,000
Severance | 23,000 | 30,000
Unrealized loss on derivative securities |  | 79,000
Other | 107,000 | 106,000
Valuation allowance | 12,545,000 | 11,441,000
Total deferred tax assets | 2,865,000 | 3,033,000
Deferred tax liabilities: |  |
Unrealized gain on derivative securities | 160,000 |
MH-LLC investment | 1,168,000 | 819,000
Exploration costs | 845,000 | 845,000
Unrealized gains on marketable equity securities | 688,000 | 2,328,000
Other | 4,000 | 4,000
Total deferred tax liabilities | 2,865,000 | 3,996,000
Net deferred tax liabilities |  | $ 963,000

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