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Summary of significant accounting policies - Concentration of Credit Risk (Details) (USD $)
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12 Months Ended | |
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Dec. 31, 2014
customer
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Dec. 31, 2013
customer
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| Concentration Risk [Line Items] | ||
| Cash, FDIC Insured Amount | 250,000us-gaap_CashFDICInsuredAmount | |
| Cash, Uninsured Amount | 1,272,500us-gaap_CashUninsuredAmount | 7,410,000us-gaap_CashUninsuredAmount |
| Customer concentration risk | Revenues | ||
| Concentration Risk [Line Items] | ||
| Number of customer representing more than 10% of revenues or trade accounts receivable |
353tcgn_ConcentrationRiskNumberOfSignificantCustomers / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember |
0tcgn_ConcentrationRiskNumberOfSignificantCustomers / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember |
| Concentration risk, percentage |
100.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember |
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| Customer concentration risk | Trade accounts receivable | ||
| Concentration Risk [Line Items] | ||
| Number of customer representing more than 10% of revenues or trade accounts receivable |
1tcgn_ConcentrationRiskNumberOfSignificantCustomers / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember |
1tcgn_ConcentrationRiskNumberOfSignificantCustomers / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember |
| Concentration risk, percentage |
13.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember |
22.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember |
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- Definition
Concentration Risk, Number of Significant Customers No definition available.
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- Definition
The amount of cash deposited in financial institutions as of the balance sheet date that is insured by the Federal Deposit Insurance Corporation. No definition available.
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- Definition
The amount of cash as of the balance sheet date that is not insured by the Federal Deposit Insurance Corporation. No definition available.
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- Details
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- Definition
For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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