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
Uncategorized
- Uncategorized Items - tgen-20160630.xml

Demand note payable, convertible debentures and line of credit agreement to related parties (Details)

v3.5.0.2

Demand note payable, convertible debentures and line of credit agreement to related parties (Details)		3 Months Ended	6 Months Ended	12 Months Ended
	Apr. 01, 2016 USD ($) $ / shares shares	Dec. 31, 2013	Jun. 30, 2016 USD ($)	Dec. 31, 2015 shares	Mar. 31, 2016 $ / shares	Jun. 15, 2015 USD ($)	Dec. 23, 2013 USD ($)
Convertible debentures \| Michaelson Capital Special Finance Fund LP.
Debt Instrument [Line Items]
Convertible debentures, related party, current	$ 3,150,000						$ 3,000,000
Related party debt, stated interest rate		4.00%
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%
Increase to related party convertible debenture	$ 150,000
Debt conversion, amount converted			$ 1,000
Conversion price in usd per share \| $ / shares	$ 3.54				$ 3.37
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%
Convertible debentures \| Michaelson Capital Special Finance Fund LP. \| Common Stock
Debt Instrument [Line Items]
Debt conversion, number of shares issued \| shares	282.49
Common stock issuable upon conversion (shares) \| shares				890,207
Convertible debentures \| Management
Debt Instrument [Line Items]
Related party debt, stated interest rate			6.00%
Line of Credit \| Chief Executive Officer (John N. Hatsopoulos)
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity						$ 2,000,000
Line Of Credit Facility, Maximum Withdrawal Limit Per Financial Calendar Quarter						$ 250,000

- Definition

Convertible Debenture, Related Parties, Current

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

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

+ References

No definition available.

+ Details

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

- Definition

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

+ References

No definition available.

+ Details

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Namespace Prefix:	tgen_
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Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Repurchase, Percentage of Principal and Interest

+ References

No definition available.

+ Details

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

- Definition

Line Of Credit Facility, Maximum Withdrawal Limit Per Financial Calendar Quarter

+ References

No definition available.

+ Details

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Namespace Prefix:	tgen_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- 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

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-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

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-Topic 230
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586

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Period Type:	duration

- 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

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-Name Accounting Standards Codification
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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.

+ Details

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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.

+ Details

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- Definition

The increase (decrease) during the reporting period in the current portion (due within one year or one business cycle, whichever is longer) of the amount owed by the reporting entity in the form of loans and obligations (generally evidenced by promissory notes) made by the following types of related parties: a parent company and its subsidiaries; subsidiaries of a common parent; an entity and trust for the benefit of employees, such as pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; an entity and its principal owners, management, or member of their immediate families; affiliates; or other parties with the ability to exert significant influence.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

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Balance Type:	debit
Period Type:	duration

- 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

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	credit
Period Type:	instant

- Definition

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

+ References

No definition available.

+ Details

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