<?xml version="1.0" encoding="utf-8"?>
<FilingSummary xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <Version>2.4.0.6</Version>
  <ProcessingTime />
  <ReportFormat>Html</ReportFormat>
  <ContextCount>123</ContextCount>
  <ElementCount>332</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>48</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>10</UnitCount>
  <MyReports>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>000010 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/DocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
    </Report>
    <Report>
      <IsDefault>true</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>001000 - Statement - CONSOLIDATED BALANCE SHEETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/BalanceSheet</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>001010 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/BalanceSheetParenthetical</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS (Parenthetical)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>002000 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/StatementOfIncome</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>003000 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/CashFlows</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CASH FLOWS</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>006010 - Disclosure - DESCRIPTION OF BUSINESS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/DisclosureDescriptionOfBusiness</Role>
      <ShortName>DESCRIPTION OF BUSINESS</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>006020 - Disclosure - LIQUIDITY AND CAPITAL REQUIREMENTS AND RESTRUCTURING</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/DisclosureLiquidityAndCapitalRequirements</Role>
      <ShortName>LIQUIDITY AND CAPITAL REQUIREMENTS AND RESTRUCTURING</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>006030 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/DisclosureSummaryOfSignificantAccountingPolicies</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>006040 - Disclosure - MINING PROPERTIES, LAND AND WATER RIGHTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/DisclosureMiningPropertiesLandAndWaterRights</Role>
      <ShortName>MINING PROPERTIES, LAND AND WATER RIGHTS</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>006050 - Disclosure - ASSET RETIREMENT OBLIGATIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/DisclosureAssetRetirementObligations</Role>
      <ShortName>ASSET RETIREMENT OBLIGATIONS</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>006060 - Disclosure - COMMON STOCK UNITS, COMMON STOCK AND COMMON STOCK WARRANTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/DisclosureCommonStockUnitsCommonStockAndCommonStockWarrants</Role>
      <ShortName>COMMON STOCK UNITS, COMMON STOCK AND COMMON STOCK WARRANTS</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>006070 - Disclosure - PREFERRED STOCK</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/DisclosurePreferredStock</Role>
      <ShortName>PREFERRED STOCK</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>006080 - Disclosure - EQUITY INCENTIVES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/DisclosureEquityIncentives</Role>
      <ShortName>EQUITY INCENTIVES</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>006090 - Disclosure - CHANGES IN CONTINGENTLY REDEEMABLE NONCONTROLLING INTEREST AND EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/DisclosureChangesInContingentlyRedeemableNoncontrollingInterestAndEquity</Role>
      <ShortName>CHANGES IN CONTINGENTLY REDEEMABLE NONCONTROLLING INTEREST AND EQUITY</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>006100 - Disclosure - INCOME TAXES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/DisclosureIncomeTaxes</Role>
      <ShortName>INCOME TAXES</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>006110 - Disclosure - COMMITMENTS AND CONTINGENCIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/DisclosureCommitmentsAndContingencies</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>007030 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>008030 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/DisclosureSummaryOfSignificantAccountingPoliciesTables</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>008040 - Disclosure - MINING PROPERTIES, LAND AND WATER RIGHTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/DisclosureMiningPropertiesLandAndWaterRightsTables</Role>
      <ShortName>MINING PROPERTIES, LAND AND WATER RIGHTS (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>008050 - Disclosure - ASSET RETIREMENT OBLIGATIONS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/DisclosureAssetRetirementObligationsTables</Role>
      <ShortName>ASSET RETIREMENT OBLIGATIONS (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>008080 - Disclosure - EQUITY INCENTIVES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/DisclosureEquityIncentivesTables</Role>
      <ShortName>EQUITY INCENTIVES (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>008090 - Disclosure - CHANGES IN CONTINGENTLY REDEEMABLE NONCONTROLLING INTEREST AND EQUITY (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/DisclosureChangesInContingentlyRedeemableNoncontrollingInterestAndEquityTables</Role>
      <ShortName>CHANGES IN CONTINGENTLY REDEEMABLE NONCONTROLLING INTEREST AND EQUITY (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>008100 - Disclosure - INCOME TAXES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/DisclosureIncomeTaxesTables</Role>
      <ShortName>INCOME TAXES (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>008110 - Disclosure - COMMITMENTS AND CONTINGENCIES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/DisclosureCommitmentsAndContingenciesTables</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>009010 - Disclosure - DESCRIPTION OF BUSINESS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/DisclosureDescriptionOfBusinessDetails</Role>
      <ShortName>DESCRIPTION OF BUSINESS (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>009020 - Disclosure - LIQUIDITY AND CAPITAL REQUIREMENTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/DisclosureLiquidityAndCapitalRequirementsDetails</Role>
      <ShortName>LIQUIDITY AND CAPITAL REQUIREMENTS (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>009030 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/DisclosureSummaryOfSignificantAccountingPoliciesDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>009040 - Disclosure - MINING PROPERTIES, LAND AND WATER RIGHTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/DisclosureMiningPropertiesLandAndWaterRightsDetails</Role>
      <ShortName>MINING PROPERTIES, LAND AND WATER RIGHTS (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>009050 - Disclosure - ASSET RETIREMENT OBLIGATIONS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/DisclosureAssetRetirementObligationsDetails</Role>
      <ShortName>ASSET RETIREMENT OBLIGATIONS (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>009060 - Disclosure - COMMON STOCK UNITS, COMMON STOCK AND COMMON STOCK WARRANTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/DisclosureCommonStockUnitsCommonStockAndCommonStockWarrantsDetails</Role>
      <ShortName>COMMON STOCK UNITS, COMMON STOCK AND COMMON STOCK WARRANTS (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>009070 - Disclosure - PREFERRED STOCK (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/DisclosurePreferredStockDetails</Role>
      <ShortName>PREFERRED STOCK (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>009080 - Disclosure - EQUITY INCENTIVES, Stock Options and Stock Appreciation Rights (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/DisclosureEquityIncentivesStockOptionsAndStockAppreciationRightsDetails</Role>
      <ShortName>EQUITY INCENTIVES, Stock Options and Stock Appreciation Rights (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>009081 - Disclosure - EQUITY INCENTIVES, Summary of Equity Incentive Awards (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/DisclosureEquityIncentivesSummaryOfEquityIncentiveAwardsDetails</Role>
      <ShortName>EQUITY INCENTIVES, Summary of Equity Incentive Awards (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>009082 - Disclosure - EQUITY INCENTIVES, Compensation Cost Recognized and Capitalized Related to Equity Incentives (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/DisclosureEquityIncentivesCompensationCostRecognizedAndCapitalizedRelatedToEquityIncentivesDetails</Role>
      <ShortName>EQUITY INCENTIVES, Compensation Cost Recognized and Capitalized Related to Equity Incentives (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>009083 - Disclosure - EQUITY INCENTIVES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/DisclosureEquityIncentivesDetails</Role>
      <ShortName>EQUITY INCENTIVES (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>009090 - Disclosure - CHANGES IN CONTINGENTLY REDEEMABLE NONCONTROLLING INTEREST AND EQUITY (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/DisclosureChangesInContingentlyRedeemableNoncontrollingInterestAndEquityDetails</Role>
      <ShortName>CHANGES IN CONTINGENTLY REDEEMABLE NONCONTROLLING INTEREST AND EQUITY (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>009100 - Disclosure - INCOME TAXES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/DisclosureIncomeTaxesDetails</Role>
      <ShortName>INCOME TAXES (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>009110 - Disclosure - COMMITMENTS AND CONTINGENCIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.generalmoly.com/role/DisclosureCommitmentsAndContingenciesDetails</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <Logs>
    <Log type="Info">Element gmo_RestrictedCashAndCashEquivalentsReclamationBondsNoncurrent had a mix of decimals attribute values: -5 -3.</Log>
    <Log type="Info">Element us-gaap_CashAndCashEquivalentsAtCarryingValue had a mix of decimals attribute values: -6 -3.</Log>
    <Log type="Info">Element us-gaap_ContributionsFromNoncontrollingInterests had a mix of decimals attribute values: -6 -5 -3.</Log>
    <Log type="Info">Element us-gaap_DebtInstrumentBasisSpreadOnVariableRate had a mix of decimals attribute values: 1 4.</Log>
    <Log type="Info">Element us-gaap_DeferredFinanceCostsNoncurrentNet had a mix of decimals attribute values: -6 -3.</Log>
    <Log type="Info">Element us-gaap_InterestExpense had a mix of decimals attribute values: -5 -3.</Log>
    <Log type="Info">Element us-gaap_MineReclamationAndClosingLiabilityNoncurrent had a mix of decimals attribute values: -5 -3.</Log>
    <Log type="Info">Element us-gaap_MinorityInterestOwnershipPercentageByParent had a mix of decimals attribute values: 0 1.</Log>
    <Log type="Info">Element us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice had a mix of decimals attribute values: 0 2.</Log>
    <Log type="Info">'Monetary' elements on report '009010 - Disclosure - DESCRIPTION OF BUSINESS (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '009020 - Disclosure - LIQUIDITY AND CAPITAL REQUIREMENTS (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '009030 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '009040 - Disclosure - MINING PROPERTIES, LAND AND WATER RIGHTS (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '009050 - Disclosure - ASSET RETIREMENT OBLIGATIONS (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '009083 - Disclosure - EQUITY INCENTIVES (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '009100 - Disclosure - INCOME TAXES (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '009110 - Disclosure - COMMITMENTS AND CONTINGENCIES (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">Process Flow-Through: 001000 - Statement - CONSOLIDATED BALANCE SHEETS</Log>
    <Log type="Info">	Process Flow-Through: Removing column 'Mar. 31, 2012'</Log>
    <Log type="Info">	Process Flow-Through: Removing column 'Dec. 31, 2011'</Log>
    <Log type="Info">	Process Flow-Through: Removing column 'Dec. 31, 2001'</Log>
    <Log type="Info">Process Flow-Through: 001010 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical)</Log>
    <Log type="Info">Process Flow-Through: 002000 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS</Log>
    <Log type="Info">Process Flow-Through: 003000 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS</Log>
  </Logs>
  <InputFiles>
    <File>gmo-20130331.xml</File>
    <File>gmo-20130331.xsd</File>
    <File>gmo-20130331_cal.xml</File>
    <File>gmo-20130331_def.xml</File>
    <File>gmo-20130331_lab.xml</File>
    <File>gmo-20130331_pre.xml</File>
  </InputFiles>
  <SupplementalFiles />
  <BaseTaxonomies />
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
