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Related party transactions (Details) (USD $)
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12 Months Ended |
0 Months Ended |
3 Months Ended |
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Dec. 31, 2014
company
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Dec. 31, 2013
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Oct. 18, 2013
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Oct. 20, 2009
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Dec. 31, 2014
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Sep. 24, 2001
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| Related Party Transaction [Line Items] |
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| Number of affiliated companies |
2tcgn_RelatedPartyTransactionNumberOfAffiliatedCompanies
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| Office space and warehouse facilities |
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| Related Party Transaction [Line Items] |
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| Sublease rental |
201,440us-gaap_OperatingLeasesRentExpenseSubleaseRentals1
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= tcgn_OfficeSpaceAndWarehouseFacilitiesMember
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$ 127,784us-gaap_OperatingLeasesRentExpenseSubleaseRentals1
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= tcgn_OfficeSpaceAndWarehouseFacilitiesMember
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| Convertible debentures | Common stock |
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| Related Party Transaction [Line Items] |
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| Debt conversion, amount converted |
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3,000,000us-gaap_DebtConversionOriginalDebtAmount1
/ us-gaap_LongtermDebtTypeAxis
= tcgn_ConvertibleUnsecuredDebtMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
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| Debt conversion, number of shares issued |
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555,556us-gaap_DebtConversionConvertedInstrumentSharesIssued1
/ us-gaap_LongtermDebtTypeAxis
= tcgn_ConvertibleUnsecuredDebtMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
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| Conversion price in usd per share |
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$ 1.20us-gaap_DebtInstrumentConvertibleConversionPrice1
/ us-gaap_LongtermDebtTypeAxis
= tcgn_ConvertibleUnsecuredDebtMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
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| Affiliated companies | Sublease under operating leased assets | Office space and warehouse facilities |
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| Related Party Transaction [Line Items] |
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| Sublease rental |
127,298us-gaap_OperatingLeasesRentExpenseSubleaseRentals1
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= tcgn_OfficeSpaceAndWarehouseFacilitiesMember
/ us-gaap_RelatedPartyTransactionAxis
= tcgn_SubleaseUnderOperatingLeasedAssetsMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_AffiliatedEntityMember
|
113,784us-gaap_OperatingLeasesRentExpenseSubleaseRentals1
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= tcgn_OfficeSpaceAndWarehouseFacilitiesMember
/ us-gaap_RelatedPartyTransactionAxis
= tcgn_SubleaseUnderOperatingLeasedAssetsMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_AffiliatedEntityMember
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| Sublease operating expenses offset |
61,143us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= tcgn_OfficeSpaceAndWarehouseFacilitiesMember
/ us-gaap_RelatedPartyTransactionAxis
= tcgn_SubleaseUnderOperatingLeasedAssetsMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_AffiliatedEntityMember
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90,348us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= tcgn_OfficeSpaceAndWarehouseFacilitiesMember
/ us-gaap_RelatedPartyTransactionAxis
= tcgn_SubleaseUnderOperatingLeasedAssetsMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_AffiliatedEntityMember
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| Affiliated companies | American DG Energy |
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| Related Party Transaction [Line Items] |
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| Revenue from related parties |
1,316,294us-gaap_RevenueFromRelatedParties
/ dei_LegalEntityAxis
= tcgn_AmericanDgEnergyMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_AffiliatedEntityMember
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758,930us-gaap_RevenueFromRelatedParties
/ dei_LegalEntityAxis
= tcgn_AmericanDgEnergyMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_AffiliatedEntityMember
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| Related party transactions agreement term |
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5 years
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| Related party transactions agreement term, renewal period |
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1 year
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| Due from related party |
600,251us-gaap_DueFromAffiliates
/ dei_LegalEntityAxis
= tcgn_AmericanDgEnergyMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_AffiliatedEntityMember
|
(119,667)us-gaap_DueFromAffiliates
/ dei_LegalEntityAxis
= tcgn_AmericanDgEnergyMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_AffiliatedEntityMember
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600,251us-gaap_DueFromAffiliates
/ dei_LegalEntityAxis
= tcgn_AmericanDgEnergyMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_AffiliatedEntityMember
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| Management | Convertible debentures |
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| Related Party Transaction [Line Items] |
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| Principal amount |
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330,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= tcgn_ConvertibleUnsecuredDebtMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ManagementMember
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| Related party debt, stated interest rate |
6.00%us-gaap_RelatedPartyTransactionRate
/ us-gaap_LongtermDebtTypeAxis
= tcgn_ConvertibleUnsecuredDebtMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ManagementMember
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| Conversion price in usd per share |
1.20us-gaap_DebtInstrumentConvertibleConversionPrice1
/ us-gaap_LongtermDebtTypeAxis
= tcgn_ConvertibleUnsecuredDebtMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ManagementMember
|
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1.20us-gaap_DebtInstrumentConvertibleConversionPrice1
/ us-gaap_LongtermDebtTypeAxis
= tcgn_ConvertibleUnsecuredDebtMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ManagementMember
|
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| Management | Convertible debentures | Common stock |
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| Related Party Transaction [Line Items] |
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| Conversion price in usd per share |
1.20us-gaap_DebtInstrumentConvertibleConversionPrice1
/ us-gaap_LongtermDebtTypeAxis
= tcgn_ConvertibleUnsecuredDebtMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ManagementMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
|
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|
1.20us-gaap_DebtInstrumentConvertibleConversionPrice1
/ us-gaap_LongtermDebtTypeAxis
= tcgn_ConvertibleUnsecuredDebtMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ManagementMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
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| Member of board of directors | Convertible debentures |
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| Related Party Transaction [Line Items] |
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| Principal amount |
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200,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= tcgn_ConvertibleUnsecuredDebtMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_DirectorMember
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| Member of board of directors | Convertible debentures | Conversion of accrued interest |
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| Related Party Transaction [Line Items] |
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| Conversion price in usd per share |
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$ 4.50us-gaap_DebtInstrumentConvertibleConversionPrice1
/ us-gaap_DebtConversionByUniqueDescriptionAxis
= tcgn_ConversionOfAccruedInterestAmountMember
/ us-gaap_LongtermDebtTypeAxis
= tcgn_ConvertibleUnsecuredDebtMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_DirectorMember
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| Convertible debentures, related party, current |
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4,367tcgn_ConvertibleDebentureRelatedPartiesCurrent
/ us-gaap_DebtConversionByUniqueDescriptionAxis
= tcgn_ConversionOfAccruedInterestAmountMember
/ us-gaap_LongtermDebtTypeAxis
= tcgn_ConvertibleUnsecuredDebtMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_DirectorMember
|
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| Common stock issuable upon conversion |
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970us-gaap_DebtInstrumentConvertibleNumberOfEquityInstruments
/ us-gaap_DebtConversionByUniqueDescriptionAxis
= tcgn_ConversionOfAccruedInterestAmountMember
/ us-gaap_LongtermDebtTypeAxis
= tcgn_ConvertibleUnsecuredDebtMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_DirectorMember
|
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| Member of board of directors | Convertible debentures | Conversion of accrued interest in 2012 |
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| Related Party Transaction [Line Items] |
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| Conversion price in usd per share |
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$ 3.20us-gaap_DebtInstrumentConvertibleConversionPrice1
/ us-gaap_DebtConversionByUniqueDescriptionAxis
= tcgn_ConversionofAccruedInterestAmountin2012Member
/ us-gaap_LongtermDebtTypeAxis
= tcgn_ConvertibleUnsecuredDebtMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_DirectorMember
|
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| Convertible debentures, related party, current |
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6,913tcgn_ConvertibleDebentureRelatedPartiesCurrent
/ us-gaap_DebtConversionByUniqueDescriptionAxis
= tcgn_ConversionofAccruedInterestAmountin2012Member
/ us-gaap_LongtermDebtTypeAxis
= tcgn_ConvertibleUnsecuredDebtMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_DirectorMember
|
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| Common stock issuable upon conversion |
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2,161us-gaap_DebtInstrumentConvertibleNumberOfEquityInstruments
/ us-gaap_DebtConversionByUniqueDescriptionAxis
= tcgn_ConversionofAccruedInterestAmountin2012Member
/ us-gaap_LongtermDebtTypeAxis
= tcgn_ConvertibleUnsecuredDebtMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_DirectorMember
|
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| Member of board of directors | Convertible debentures | Conversion of accrued interest in 2012 | Common stock |
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| Related Party Transaction [Line Items] |
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| Conversion price in usd per share |
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$ 2,161us-gaap_DebtInstrumentConvertibleConversionPrice1
/ us-gaap_DebtConversionByUniqueDescriptionAxis
= tcgn_ConversionofAccruedInterestAmountin2012Member
/ us-gaap_LongtermDebtTypeAxis
= tcgn_ConvertibleUnsecuredDebtMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_DirectorMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
|
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| Member of board of directors | American DG Energy |
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| Related Party Transaction [Line Items] |
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| Related party ownership percentage |
13.00%tcgn_OwnernshipInterestPercentageRelatedParty
/ dei_LegalEntityAxis
= tcgn_AmericanDgEnergyMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_DirectorMember
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| Member of board of directors | EuroSite Power |
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| Related Party Transaction [Line Items] |
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| Related party ownership percentage |
0.70%tcgn_OwnernshipInterestPercentageRelatedParty
/ dei_LegalEntityAxis
= tcgn_EurositePowerMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_DirectorMember
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| Member of board of directors | Ilois |
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| Related Party Transaction [Line Items] |
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| Related party ownership percentage |
7.20%tcgn_OwnernshipInterestPercentageRelatedParty
/ dei_LegalEntityAxis
= tcgn_IloisMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_DirectorMember
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| Chief Executive Officer (John N. Hatsopoulos) |
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| Related Party Transaction [Line Items] |
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| Officers' compensation |
1us-gaap_OfficersCompensation
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ChiefExecutiveOfficerMember
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| Percentage of time spent on company affairs |
50.00%tcgn_PercentageOfTimeSpentByRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ChiefExecutiveOfficerMember
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| Chief Executive Officer (John N. Hatsopoulos) | Convertible debentures |
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| Related Party Transaction [Line Items] |
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| Principal amount |
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100,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= tcgn_ConvertibleUnsecuredDebtMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ChiefExecutiveOfficerMember
|
| Chief Executive Officer (John N. Hatsopoulos) | American DG Energy |
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| Related Party Transaction [Line Items] |
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| Related party ownership percentage |
19.40%tcgn_OwnernshipInterestPercentageRelatedParty
/ dei_LegalEntityAxis
= tcgn_AmericanDgEnergyMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ChiefExecutiveOfficerMember
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| Chief Executive Officer (John N. Hatsopoulos) | EuroSite Power |
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| Related Party Transaction [Line Items] |
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| Related party ownership percentage |
4.70%tcgn_OwnernshipInterestPercentageRelatedParty
/ dei_LegalEntityAxis
= tcgn_EurositePowerMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ChiefExecutiveOfficerMember
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| Michaelson |
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| Related Party Transaction [Line Items] |
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| Related party ownership percentage |
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6.40%tcgn_OwnernshipInterestPercentageRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tcgn_MichaelsonCapitalSpecialFinanceFundLP.Member
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| Michaelson | Convertible debentures |
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| Related Party Transaction [Line Items] |
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| Related party debt, stated interest rate |
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4.00%us-gaap_RelatedPartyTransactionRate
/ us-gaap_LongtermDebtTypeAxis
= tcgn_ConvertibleUnsecuredDebtMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tcgn_MichaelsonCapitalSpecialFinanceFundLP.Member
|
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| Debt conversion, amount converted |
|
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|
1,000us-gaap_DebtConversionOriginalDebtAmount1
/ us-gaap_LongtermDebtTypeAxis
= tcgn_ConvertibleUnsecuredDebtMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tcgn_MichaelsonCapitalSpecialFinanceFundLP.Member
|
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| Conversion price in usd per share |
5.40us-gaap_DebtInstrumentConvertibleConversionPrice1
/ us-gaap_LongtermDebtTypeAxis
= tcgn_ConvertibleUnsecuredDebtMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tcgn_MichaelsonCapitalSpecialFinanceFundLP.Member
|
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|
5.40us-gaap_DebtInstrumentConvertibleConversionPrice1
/ us-gaap_LongtermDebtTypeAxis
= tcgn_ConvertibleUnsecuredDebtMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tcgn_MichaelsonCapitalSpecialFinanceFundLP.Member
|
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| Convertible debentures, related party, current |
3,000,000tcgn_ConvertibleDebentureRelatedPartiesCurrent
/ us-gaap_LongtermDebtTypeAxis
= tcgn_ConvertibleUnsecuredDebtMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tcgn_MichaelsonCapitalSpecialFinanceFundLP.Member
|
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|
|
3,000,000tcgn_ConvertibleDebentureRelatedPartiesCurrent
/ us-gaap_LongtermDebtTypeAxis
= tcgn_ConvertibleUnsecuredDebtMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tcgn_MichaelsonCapitalSpecialFinanceFundLP.Member
|
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| Michaelson | Convertible debentures | Common stock |
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| Related Party Transaction [Line Items] |
|
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| Debt conversion, number of shares issued |
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|
185.19us-gaap_DebtConversionConvertedInstrumentSharesIssued1
/ us-gaap_LongtermDebtTypeAxis
= tcgn_ConvertibleUnsecuredDebtMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tcgn_MichaelsonCapitalSpecialFinanceFundLP.Member
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
|
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| Common stock issuable upon conversion |
555,556us-gaap_DebtInstrumentConvertibleNumberOfEquityInstruments
/ us-gaap_LongtermDebtTypeAxis
= tcgn_ConvertibleUnsecuredDebtMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tcgn_MichaelsonCapitalSpecialFinanceFundLP.Member
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
|
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| Investor | Ilois |
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| Related Party Transaction [Line Items] |
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| Related party ownership percentage |
3.10%tcgn_OwnernshipInterestPercentageRelatedParty
/ dei_LegalEntityAxis
= tcgn_IloisMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_InvestorMember
|
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