Annual report pursuant to Section 13 and 15(d)

Noncontrolling interests (Details)

v2.4.1.9
Noncontrolling interests (Details) (Ilios)
Dec. 31, 2014
Noncontrolling Interest [Line Items]  
Noncontrolling Interest, Shares 9,500,000tcgn_NoncontrollingInterestShares
Outstanding shares 14,610,000us-gaap_SharesOutstanding
The Company's ownership percentage in subsidiary 65.00%us-gaap_MinorityInterestOwnershipPercentageByParent
Restricted stock  
Noncontrolling Interest [Line Items]  
The Company's ownership percentage in subsidiary 63.70%us-gaap_MinorityInterestOwnershipPercentageByParent
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ dei_LegalEntityAxis
= tcgn_IliosMember
Ilios restricted stock 310,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ dei_LegalEntityAxis
= tcgn_IliosMember
Restricted Shares Vest  
Noncontrolling Interest [Line Items]  
The Company's ownership percentage in subsidiary 63.70%us-gaap_MinorityInterestOwnershipPercentageByParent
/ dei_LegalEntityAxis
= tcgn_IliosMember
/ us-gaap_StatementScenarioAxis
= tcgn_RestrictedSharesVestMember