Quarterly report pursuant to Section 13 or 15(d)

Cover
- Document and Entity Information Document and Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Description of business and summary of significant accounting policies (Policies)
Notes Tables
Notes Details

Demand note payable and convertible debentures - related party (Details)

v3.2.0.727

Demand note payable and convertible debentures - related party (Details)	3 Months Ended	6 Months Ended	12 Months Ended
	Dec. 31, 2013 USD ($) shares	Jun. 30, 2015 USD ($)	Dec. 31, 2013 shares	Dec. 31, 2012 shares	Dec. 31, 2014 USD ($) $ / shares	Jul. 22, 2013 USD ($)
Convertible debentures \| Common stock
Debt Instrument [Line Items]
Common stock issuable upon conversion \| shares				555,556
Convertible debentures \| Michaelson Capital Special Finance Fund LP. [Member]
Debt Instrument [Line Items]
Related party debt, stated interest rate	4.00%
Conversion price in usd per share \| $ / shares					$ 5.40
Debt conversion, amount converted	$ 1,000
Convertible debentures, related party, current					$ 3,000,000
Debt Instrument, Term	3 years
Debt Instrument, Convertible, Accrue Rate After Occurrence and During Continuance	8.00%
Debt Instrument, Convertible, Accrue Rate After Occurrence and During Continuance, Other Default	2.00%
Debt Instrument, Convertible, Threshold Consecutive Trading Days	20 days
Debt Instrument, Convertible, If-converted Value in Excess of Principal	$ 150,000
Debt Instrument, Repurchase, Percentage of Principal and Interest	120.00%
Debt Issuance Cost	$ 147,577
Convertible debentures \| Michaelson Capital Special Finance Fund LP. [Member] \| Common stock
Debt Instrument [Line Items]
Debt conversion, number of shares issued \| shares	185.19
Common stock issuable upon conversion \| shares			555,556
Convertible debentures \| Management [Member]
Debt Instrument [Line Items]
Related party debt, stated interest rate		6.00%
Revolving Credit Facility [Member] \| Chief Executive Officer (John N. Hatsopoulos)
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 2,000,000				$ 1,055,000

- Definition

Convertible Debenture, Related Parties, Current

+ References

No definition available.

+ Details

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- Definition

Debt Instrument, Convertible, Accrue Rate After Occurrence and During Continuance

+ References

No definition available.

+ Details

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Namespace Prefix:	tcgn_
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- Definition

Debt Instrument, Convertible, Accrue Rate After Occurrence and During Continuance, Other Default

+ References

No definition available.

+ Details

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Balance Type:	na
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- Definition

Debt Instrument, Repurchase, Percentage of Principal and Interest

+ References

No definition available.

+ Details

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Namespace Prefix:	tcgn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

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- Definition

The amount of the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586

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- Definition

The price per share of the conversion feature embedded in the debt instrument.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

-SubTopic 20

-Section 50

-Paragraph 5

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6928298&loc=SL6031898-161870

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- Definition

The amount by which the convertible debt's if-converted value exceeds its principle amount at the balance sheet date, regardless of whether the instrument is currently convertible. This element applies to public companies only.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

-SubTopic 20

-Section 50

-Paragraph 5

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6928298&loc=SL6031898-161870

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- Definition

The number of equity instruments that the holder of the debt instrument would receive if the debt was converted to equity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(5))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 6

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 7

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21521-112644

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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- Definition

Threshold period of specified consecutive trading days within which common stock price to conversion price of convertible debt instruments must exceed threshold percentage for a specified number of trading days to trigger conversion feature, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Amount of debt issuance costs (for example, but not limited to, legal, accounting, broker, and regulatory fees).

+ References

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+ Details

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Balance Type:	debit
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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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- Definition

Identify the stated interest rate per the agreement, for example, leasing and debt arrangements between related parties.

+ References

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