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Income Taxes - Income Taxes - Net Deferred Taxes in Balance Sheet (Details) (USD $)
 12 Months Ended
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