Annual report pursuant to Section 13 and 15(d)

Cover
- Document and Entity Information Document and Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Summary of significant accounting policies (Policies)
Notes Tables
Notes Details
Uncategorized
- Uncategorized Items - tgen-20161231.xml

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

v3.6.0.2

Demand note payable and convertible debentures - related party (Details)		3 Months Ended	12 Months Ended
	Dec. 23, 2013 USD ($)	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2016 USD ($) shares $ / shares	Dec. 31, 2015 shares	Apr. 01, 2016 USD ($) $ / shares	Mar. 31, 2016 $ / shares
Michaelson
Debt Instrument [Line Items]
Related party ownership percentage		5.70%
Demand notes \| Maximum
Debt Instrument [Line Items]
Related party debt, stated interest rate			6.00%
Demand notes \| Chief Executive Officer (John N. Hatsopoulos)
Debt Instrument [Line Items]
Demand notes payable, related party, current		$ 2,000,000	$ 2,000,000
Demand notes payable, withdrawal limit per quarter		$ 250,000	$ 250,000
Convertible debentures \| Michaelson
Debt Instrument [Line Items]
Principal amount	$ 3,000,000				$ 3,150,000
Related party debt, stated interest rate		4.00%
Debt term	3 years
Conversion price in usd per share \| $ / shares		$ 3.54	$ 3.54		$ 3.54	$ 3.37
Accrue rate after occurrence and during continuance		8.00%
Accrue rate after occurrence and during continuance on other default		2.00%
Debt conversion, amount converted		$ 1,000
Consecutive trading days		20 days
Maximum conversion amount		$ 150,000
Percentage of principal and interest		120.00%
Debt issuance costs	$ 152,135
Unamortized debt issuance cost		$ 1,491	$ 1,491
Convertible debentures \| Michaelson \| Common stock
Debt Instrument [Line Items]
Debt conversion, number of shares issued \| shares		282.49
Convertible Debenture \| Convertible debentures \| Common stock
Debt Instrument [Line Items]
Debt conversion, number of shares issued \| shares				890,207
Convertible Debenture \| Convertible debentures \| Michaelson \| Common stock
Debt Instrument [Line Items]
Common stock issuable upon conversion \| shares			889,831

- Definition

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

+ 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, Convertible, Accrue Rate After Occurrence and During Continuance, Other Default

+ References

No definition available.

+ Details

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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
Balance Type:	credit
Period Type:	instant

- Definition

Ownernship Interest, Percentage, Related Party

+ References

No definition available.

+ Details

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Namespace Prefix:	tgen_
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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

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-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

+ Details

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Period Type:	duration

- 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
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-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586

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Namespace Prefix:	us-gaap_
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Balance Type:	credit
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

+ Details

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Balance Type:	na
Period Type:	instant

- 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

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- 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))
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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	duration

- 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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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- 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

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount for notes payable (written promise to pay), due to related parties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(k)(1))
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-Paragraph 1
-Subparagraph (SX 210.5-02.19(a)(5))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Data Type:	xbrli:monetaryItemType
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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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

+ References

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Period Type:	instant

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