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Consolidated Statements of Cash Flows (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Operating activities:    
Net loss $ (1,843,000)us-gaap_OperatingIncomeLoss $ (2,005,000)us-gaap_OperatingIncomeLoss
Adjustments to reconcile net loss to net cash used in operating activities:    
(Gain) loss on derivative instruments (39,000)us-gaap_GainLossOnSaleOfDerivatives (90,000)us-gaap_GainLossOnSaleOfDerivatives
Depreciation and amortization 13,000us-gaap_DepreciationAndAmortization 26,000us-gaap_DepreciationAndAmortization
Loss on equity method investment 153,000us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal 1,012,000us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal
Property abandonment and impairment (20,000)us-gaap_GainLossOnDispositionOfAssets (13,000)us-gaap_GainLossOnDispositionOfAssets
Employee stock option expense 778,000us-gaap_StockOptionPlanExpense 420,000us-gaap_StockOptionPlanExpense
Deferred income taxes    (176,000)us-gaap_IncreaseDecreaseInDeferredIncomeTaxes
(Gain) loss on warrant liability (85,000)us-gaap_IncreaseDecreaseInDerivativeLiabilities (998,000)us-gaap_IncreaseDecreaseInDerivativeLiabilities
(Gain) on asset and equity security sales (473,000)us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet (153,000)us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet
(Gain) on early termination of debt    (313,000)us-gaap_EarlyRepaymentOfSubordinatedDebt
Changes in operating assets and liabilities:    
Prepaid expenses and other current assets 75,000us-gaap_IncreaseDecreaseInPrepaidExpense 78,000us-gaap_IncreaseDecreaseInPrepaidExpense
Accounts payable and other current liabilities (209,000)us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities (51,000)us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities
Net cash (used in) operating activities (1,610,000)us-gaap_NetCashProvidedByUsedInOperatingActivities (2,237,000)us-gaap_NetCashProvidedByUsedInOperatingActivities
Investing activities:    
Additions to mineral properties (1,960,000)us-gaap_PaymentsToAcquireProjects (2,173,000)us-gaap_PaymentsToAcquireProjects
Additions to other assets (334,000)us-gaap_PaymentsToAcquireOtherProductiveAssets (318,000)us-gaap_PaymentsToAcquireOtherProductiveAssets
Sale of derivative instrument, net 36,000us-gaap_ProceedsFromDerivativeInstrumentInvestingActivities 90,000us-gaap_ProceedsFromDerivativeInstrumentInvestingActivities
Proceeds from sale of marketable equity securities 556,000us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities 839,000us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities
Proceeds from sale of other assets 11,000us-gaap_ProceedsFromSaleOfOtherProductiveAssets 79,000us-gaap_ProceedsFromSaleOfOtherProductiveAssets
Proceeds from sale of mineral property    4,000,000us-gaap_ProceedsFromSaleOfOtherPropertyPlantAndEquipment
Net cash (used in) provided by investing activities (1,691,000)us-gaap_NetCashProvidedByUsedInInvestingActivities 2,517,000us-gaap_NetCashProvidedByUsedInInvestingActivities
Financing activities:    
Proceeds from issuance of debt, net 1,500,000us-gaap_ProceedsFromIssuanceOfLongTermDebtAndCapitalSecuritiesNet 2,000,000us-gaap_ProceedsFromIssuanceOfLongTermDebtAndCapitalSecuritiesNet
Proceeds from issuance of common stock , net 1,630,000us-gaap_ProceedsFromIssuanceOfCommonStock 2,060,000us-gaap_ProceedsFromIssuanceOfCommonStock
Short-term borrowing 100,000us-gaap_ProceedsFromShortTermDebt 2,300,000us-gaap_ProceedsFromShortTermDebt
Repayment of short-term borrowing (902,000)us-gaap_RepaymentsOfShortTermDebt (2,998,000)us-gaap_RepaymentsOfShortTermDebt
Payment to noncontrolling interest (250,000)us-gaap_PaymentsToMinorityShareholders (550,000)us-gaap_PaymentsToMinorityShareholders
Repayment of long-term debt    (2,050,000)us-gaap_RepaymentsOfLongTermDebt
Proceeds from exercise of options    184,000us-gaap_ProceedsFromStockOptionsExercised
Noncontrolling interest contribution, net    250,000us-gaap_ProceedsFromMinorityShareholders
Net cash provided by financing activities 2,078,000us-gaap_NetCashProvidedByUsedInFinancingActivities 1,196,000us-gaap_NetCashProvidedByUsedInFinancingActivities
Net (decrease) increase in cash and cash equivalents (1,223,000)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease 1,476,000us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents, beginning of year 2,092,000us-gaap_CashAndCashEquivalentsAtCarryingValue 616,000us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents, end of year 869,000us-gaap_CashAndCashEquivalentsAtCarryingValue 2,092,000us-gaap_CashAndCashEquivalentsAtCarryingValue
Supplemental disclosure of cash flow information:    
Cash paid for interest, capitalized to mineral property 220,000us-gaap_InterestPaid 186,000us-gaap_InterestPaid
Capitalized non-cash interest 412,000us-gaap_InterestCostsCapitalized 540,000us-gaap_InterestCostsCapitalized
Capitalized depreciation 21,000us-gaap_DepreciationAmortizationAndAccretionNet 30,000us-gaap_DepreciationAmortizationAndAccretionNet
Capitalized property payment included in accounts payable 150,000us-gaap_IncreaseDecreaseInAccountsPayable   
Issuance of stock for mineral property 38,000us-gaap_ProceedsFromPaymentsForOtherFinancingActivities 41,000us-gaap_ProceedsFromPaymentsForOtherFinancingActivities
Issuance of stock from restricted stock grant 45,000us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation   
Issuance of stock to noncontrolling interest    381,000us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance
Shares of Ely marketable equity securities received upon payment of Augusta debt    $ 1,800,000us-gaap_PaymentsToAcquireMarketableSecurities