General form of registration statement for all companies including face-amount certificate companies

Cover
- Document And Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Summary of significant accounting policies (Policies)
Notes Tables
Notes Details

Stock-based compensation - Restricted Stock Activity (Details)

v2.4.0.8

Stock-based compensation - Restricted Stock Activity (Details) (USD $)	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Tecogen
Unvested Restricted Stock [Roll Forward]
Unvested, Beginning (shares)	399,070
Granted (shares)	0
Vested (shares)	0
Forfeited (shares)	(37,500)
Unvested, Ending (shares)	361,570
Weighted Average Grant Date Fair Value [Roll Forward]
Unvested, Beginning (usd per share)	$ 1.44
Granted (usd per share)	$ 0
Vested (usd per share)	$ 0
Forfeited (usd per share)	$ 2.60
Unvested, Ending (usd per share)	$ 1.31
Tecogen \| Restricted stock
Unvested Restricted Stock [Roll Forward]
Unvested, Beginning (shares)		483,317	433,317	414,106
Granted (shares)		0	50,000	19,211
Vested (shares)		0	0	0
Forfeited (shares)		(84,247)	0	0
Unvested, Ending (shares)		399,070	483,317	433,317
Weighted Average Grant Date Fair Value [Roll Forward]
Unvested, Beginning (usd per share)		$ 1.44	$ 1.28	$ 1.24
Granted (usd per share)		$ 0	$ 2.60	$ 2.60
Vested (usd per share)		$ 0	$ 0	$ 0
Forfeited (usd per share)		$ 1.36	$ 0	$ 0
Unvested, Ending (usd per share)		$ 1.44	$ 1.44	$ 1.28
Ilois \| Restricted stock
Unvested Restricted Stock [Roll Forward]
Unvested, Beginning (shares)	510,000	560,000	360,000	360,000
Granted (shares)	0	0	200,000	0
Vested (shares)	0	0	0	0
Forfeited (shares)	(200,000)	(50,000)	0	0
Unvested, Ending (shares)	310,000	510,000	560,000	360,000
Weighted Average Grant Date Fair Value [Roll Forward]
Unvested, Beginning (usd per share)	$ 0.26	$ 0.24	$ 0.10	$ 0.10
Granted (usd per share)	$ 0	$ 0	$ 0.50	$ 0
Vested (usd per share)	$ 0	$ 0	$ 0	$ 0
Forfeited (usd per share)	$ 0.50	$ 0.10	$ 0	$ 0
Unvested, Ending (usd per share)	$ 0.10	$ 0.26	$ 0.24	$ 0.10

- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iv)(3)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(3)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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