XML 19 R30.htm IDEA: XBRL DOCUMENT v2.4.1.9
Related Party Transactions (Details) (USD $)
1 Months Ended 0 Months Ended 3 Months Ended
Feb. 28, 2014
Sep. 17, 2007
Sep. 17, 2007
Mar. 31, 2015
Dec. 31, 2014
Dec. 18, 2007
May 15, 2014
Productive Wells [Line Items]              
Bond, face value           $ 10,700,000us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability  
Related party allowance for doubtful accounts receivable       14,000us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent 14,000us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent    
Suspended portion of accounts payable       602,000tgc_AccountsPayableRelatedPartiesSuspendedPortion 590,000tgc_AccountsPayableRelatedPartiesSuspendedPortion    
Right-Of-Use And Easement Bonds [Member]              
Productive Wells [Line Items]              
Bond, face value       1,550,000us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability
/ us-gaap_FinancialInstrumentAxis
= tgc_RightOfUseAndEasementBondsMember
     
Ten Well Program [Member]              
Productive Wells [Line Items]              
Wells in process of drilling   10us-gaap_WellsInProcessOfDrilling
/ us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionProductionTypeAxis
= tgc_TenWellProgramMember
10us-gaap_WellsInProcessOfDrilling
/ us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionProductionTypeAxis
= tgc_TenWellProgramMember
       
Percent of net profits, interest 75.00%tgc_PercentOfNetProfits
/ us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionProductionTypeAxis
= tgc_TenWellProgramMember
           
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
/ us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionProductionTypeAxis
= tgc_TenWellProgramMember
/ us-gaap_RangeAxis
= tgc_AtOrAboveRevenueThresholdMember
  85.00%tgc_PercentOfWorkingInterestRevenueAsFee
/ us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionProductionTypeAxis
= tgc_TenWellProgramMember
/ us-gaap_RangeAxis
= tgc_AtOrAboveRevenueThresholdMember
       
Percent of net profits, interest 7.50%tgc_PercentOfNetProfits
/ us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionProductionTypeAxis
= tgc_TenWellProgramMember
/ us-gaap_RangeAxis
= tgc_AtOrAboveRevenueThresholdMember
75.00%tgc_PercentOfNetProfits
/ us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionProductionTypeAxis
= 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
/ us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionProductionTypeAxis
= tgc_TenWellProgramMember
/ us-gaap_RangeAxis
= tgc_UpToRevenueThresholdMember
  25.00%tgc_PercentOfWorkingInterestRevenueAsFee
/ us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionProductionTypeAxis
= tgc_TenWellProgramMember
/ us-gaap_RangeAxis
= tgc_UpToRevenueThresholdMember
       
Hoactzin Partners, L.P. [Member]              
Productive Wells [Line Items]              
Percentage of cash collateral       100.00%tgc_CashCollateralForBorrowedSecuritiesPercentage
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tgc_HoactzinPartnersLPMember
     
Related parties accounts payable       159,000us-gaap_AccountsPayableRelatedPartiesCurrentAndNoncurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tgc_HoactzinPartnersLPMember
159,000us-gaap_AccountsPayableRelatedPartiesCurrentAndNoncurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tgc_HoactzinPartnersLPMember
   
Past due related parties accounts payable       159,000tgc_AccountsPayableRelatedPartiesCurrentAndNoncurrentPastDueAmount
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tgc_HoactzinPartnersLPMember
     
Liability to related party       0us-gaap_DueToRelatedPartiesCurrentAndNoncurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tgc_HoactzinPartnersLPMember
     
Hoactzin Partners, L.P. [Member] | Methane Project [Member]              
Productive Wells [Line Items]              
Net profits       0us-gaap_ProfitLoss
/ us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionProductionTypeAxis
= tgc_MethaneProjectMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tgc_HoactzinPartnersLPMember
     
Indem Co [Member]              
Productive Wells [Line Items]              
Liability to related party             0us-gaap_DueToRelatedPartiesCurrentAndNoncurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tgc_IndemCoMember
Related Party [Member]              
Productive Wells [Line Items]              
Related party allowance for doubtful accounts receivable       159,000us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
/ us-gaap_RelatedPartyTransactionAxis
= tgc_RelatedPartyMember
159,000us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
/ us-gaap_RelatedPartyTransactionAxis
= tgc_RelatedPartyMember
   
Related Party [Member] | Hoactzin Partners, L.P. [Member]              
Productive Wells [Line Items]              
Related party allowance for doubtful accounts receivable       $ 159,000us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
/ us-gaap_RelatedPartyTransactionAxis
= tgc_RelatedPartyMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tgc_HoactzinPartnersLPMember