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Construction Backlog (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Summary of signed engineering and project management contracts
Balance - January 1	$ 49,593us-gaap_ConstructionInProgressGross	$ 1,405,803us-gaap_ConstructionInProgressGross
New contracts and change orders during the period	271,503sgbx_AmountOfNewContractsAndChangeOrdersDuringPeriod	1,180,802sgbx_AmountOfNewContractsAndChangeOrdersDuringPeriod
New contracts and change orders during period, gross	321,096sgbx_NewContractsAndChangeOrdersDuringPeriodGrossAmount	2,586,605sgbx_NewContractsAndChangeOrdersDuringPeriodGrossAmount
Less: contract revenue earned during the period	(314,896)us-gaap_ContractsRevenue	(2,537,012)us-gaap_ContractsRevenue
New contracts and change orders during period net	6,200sgbx_NewContractsAndChangeOrdersDuringPeriodNet	49,593sgbx_NewContractsAndChangeOrdersDuringPeriodNet
Contracts signed but not started
Balance - December 31	$ 6,200us-gaap_ConstructionInProgressGross	$ 49,593us-gaap_ConstructionInProgressGross

X

- Definition

Amount of New contracts and change orders during the period.

+ References

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- Definition

Contracts signed but not started.

+ References

No definition available.

+ Details

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Namespace Prefix:	sgbx_
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- Definition

Gross amount new contracts and change orders during the period.

+ References

No definition available.

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Namespace Prefix:	sgbx_
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- Definition

New contracts and change orders during period net.

+ References

No definition available.

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- Details

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X

- Definition

Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

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

X

- Definition

Revenue earned during the period arising from products sold or services provided under the terms of a contract, not elsewhere specified in the taxonomy. May include government contracts, construction contracts, and any other contract related to a particular project or product.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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