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v2.4.1.9

Related Party Transactions (Details) (USD $) | 0 Months Ended | 12 Months Ended | 0 Months Ended | 1 Months Ended |
--- | --- | --- | --- | --- | ---
Dec. 18, 2007 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Sep. 17, 2007 item | Feb. 28, 2014 | Jan. 31, 2014 | Mar. 31, 2008 | May 15, 2014
Productive Wells [Line Items] |  |  |  |  |  |  |  |  |
Cost incurred, development costs |  | $ 864,000 us-gaap_CostsIncurredDevelopmentCosts | $ 998,000 us-gaap_CostsIncurredDevelopmentCosts | $ 2,649,000 us-gaap_CostsIncurredDevelopmentCosts |  |  |  |  |
Percent of executive salary | 50.00%tgc_PercentOfExecutiveSalary |  |  |  |  |  |  |  |
Working interest percent | 15.00%tgc_WorkingInterestPercent |  |  |  |  |  |  |  |
Bond, face value | 10,700,000 us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability |  |  |  |  |  |  |  | 0 us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability
Cash collateral | 6,600,000 us-gaap_CashCollateralForBorrowedSecurities |  |  |  |  |  |  |  |
Percent of cash collateral |  | 100.00%tgc_PercentageOfCashCollateraLforBorrowedSecurities |  |  |  |  |  |  |
Related parties accounts payable |  | 159,000 us-gaap_AccountsPayableRelatedPartiesCurrentAndNoncurrent | 327,000 us-gaap_AccountsPayableRelatedPartiesCurrentAndNoncurrent |  |  |  |  |  |
Allowance For Doubtful Accounts, Due from Related Parties, Current |  | 159,000 tgc_AllowanceForDoubtfulAccountsDueFromRelatedPartiesCurrent | 257,000 tgc_AllowanceForDoubtfulAccountsDueFromRelatedPartiesCurrent |  |  |  |  |  |
Accounts payable - related party |  | 590,000 us-gaap_AccountsPayableRelatedPartiesCurrent | 412,000 us-gaap_AccountsPayableRelatedPartiesCurrent |  |  |  |  |  |
Right-Of-Use And Easement Bonds [Member] |  |  |  |  |  |  |  |  |
Productive Wells [Line Items] |  |  |  |  |  |  |  |  |
Bond, face value |  | 1,550,000 us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability / us-gaap_FinancialInstrumentAxis = tgc_RightOfUseAndEasementBondsMember |  |  |  |  |  |  |
Ten Well Program [Member] |  |  |  |  |  |  |  |  |
Productive Wells [Line Items] |  |  |  |  |  |  |  |  |
Wells in process of drilling |  |  |  |  | 10 us-gaap_WellsInProcessOfDrilling / tgc_ExplorationAndProductionRevenueByTypeAxis = tgc_TenWellProgramMember |  |  |  |
Number of wildcat wells |  |  |  |  | 3 tgc_NumberOfWildcatWells / tgc_ExplorationAndProductionRevenueByTypeAxis = tgc_TenWellProgramMember |  |  |  |
Number of developmental wells |  |  |  |  | 7 tgc_NumberOfDevelopmentalWells / tgc_ExplorationAndProductionRevenueByTypeAxis = tgc_TenWellProgramMember |  |  |  |
Percent of working interest revenue, as a fee |  |  |  |  |  | 85.00%tgc_PercentOfWorkingInterestRevenueAsFee / tgc_ExplorationAndProductionRevenueByTypeAxis = tgc_TenWellProgramMember | 25.00%tgc_PercentOfWorkingInterestRevenueAsFee / tgc_ExplorationAndProductionRevenueByTypeAxis = tgc_TenWellProgramMember |  |
Payout point multiplier |  |  |  |  | 1.35 tgc_PayoutPointMultiplier / tgc_ExplorationAndProductionRevenueByTypeAxis = tgc_TenWellProgramMember |  |  |  |
Payout point value |  |  |  |  |  |  |  | 5,200,000 tgc_PayoutPointValue / tgc_ExplorationAndProductionRevenueByTypeAxis = tgc_TenWellProgramMember |
Related party transaction |  |  |  |  |  |  |  | 3,850,000 us-gaap_RelatedPartyTransactionDueFromToRelatedParty / tgc_ExplorationAndProductionRevenueByTypeAxis = tgc_TenWellProgramMember |
Ten Well Program [Member] | Producing Well [Member] |  |  |  |  |  |  |  |  |
Productive Wells [Line Items] |  |  |  |  |  |  |  |  |
Cost incurred, development costs |  |  |  |  | 400,000 us-gaap_CostsIncurredDevelopmentCosts / tgc_ExplorationAndProductionRevenueByTypeAxis = tgc_TenWellProgramMember / us-gaap_StatementGeographicalAxis = tgc_ProducingWellMember |  |  |  |
Ten Well Program [Member] | Non-Productive Well [Member] |  |  |  |  |  |  |  |  |
Productive Wells [Line Items] |  |  |  |  |  |  |  |  |
Cost incurred, development costs |  |  |  |  | 250,000 us-gaap_CostsIncurredDevelopmentCosts / tgc_ExplorationAndProductionRevenueByTypeAxis = tgc_TenWellProgramMember / us-gaap_StatementGeographicalAxis = tgc_NonProductiveWellMember |  |  |  |
Ten Well Program [Member] | At Or Above Revenue Threshold [Member] |  |  |  |  |  |  |  |  |
Productive Wells [Line Items] |  |  |  |  |  |  |  |  |
Percent of working interest revenue, as a fee |  |  |  |  | 85.00%tgc_PercentOfWorkingInterestRevenueAsFee / tgc_ExplorationAndProductionRevenueByTypeAxis = tgc_TenWellProgramMember / us-gaap_RangeAxis = tgc_AtOrAboveRevenueThresholdMember |  |  |  |
Ten Well Program [Member] | Up To Revenue Threshold [Member] |  |  |  |  |  |  |  |  |
Productive Wells [Line Items] |  |  |  |  |  |  |  |  |
Percent of working interest revenue, as a fee |  |  |  |  | 25.00%tgc_PercentOfWorkingInterestRevenueAsFee / tgc_ExplorationAndProductionRevenueByTypeAxis = tgc_TenWellProgramMember / us-gaap_RangeAxis = tgc_UpToRevenueThresholdMember |  |  |  |
Methane Project [Member] |  |  |  |  |  |  |  |  |
Productive Wells [Line Items] |  |  |  |  |  |  |  |  |
Percent of net profits, interest |  |  |  |  | 75.00%tgc_PercentOfNetProfits / tgc_ExplorationAndProductionRevenueByTypeAxis = tgc_MethaneProjectMember | 7.50%tgc_PercentOfNetProfits / tgc_ExplorationAndProductionRevenueByTypeAxis = tgc_MethaneProjectMember | 75.00%tgc_PercentOfNetProfits / tgc_ExplorationAndProductionRevenueByTypeAxis = tgc_MethaneProjectMember |  |
Hoactzin [Member] |  |  |  |  |  |  |  |  |
Productive Wells [Line Items] |  |  |  |  |  |  |  |  |
Allowance For Doubtful Accounts, Due from Related Parties, Current |  | $ 159,000 tgc_AllowanceForDoubtfulAccountsDueFromRelatedPartiesCurrent / tgc_RelatedPartyTransactionsByTypeAxis = tgc_HoactzinMember |  |  |  |  |  |  |

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- Definition Receivables to be collected from (obligations owed to) related parties, net as of the balance sheet date where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(k)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph k -Subparagraph 1 -Article 4 + Details
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