Fair value of stock options.

No definition available.

Name:	sgbx_FairValueOfStockOptions
Namespace Prefix:	sgbx_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Issuance of additional shares of common stock in form of restricted stock or option.

+ References

No definition available.

+ Details

Name:	sgbx_IssuanceOfAdditionalSharesOfCommonStockInFormOfRestrictedStockOrOption
Namespace Prefix:	sgbx_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of common stock available for issuance.

+ References

No definition available.

+ Details

Name:	sgbx_NumberOfCommonStockAvailableForIssuance
Namespace Prefix:	sgbx_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of common stock to be granted to the eligible officers directors employees consultants advisors maximum.

+ References

No definition available.

+ Details

Name:	sgbx_NumberOfCommonStockToBeGrantedToEligibleOfficersDirectorsEmployeesConsultantsAdvisorsMaximum
Namespace Prefix:	sgbx_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Stock option plan maturity date.

+ References

No definition available.

+ Details

Name:	sgbx_StockOptionPlanMaturityDate
Namespace Prefix:	sgbx_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	sgbx_StockOptionsAndGrantsTextualAbstract
Namespace Prefix:	sgbx_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 14.F)

-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(1)(i)

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

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section F

+ Details

Name:	us-gaap_AllocatedShareBasedCompensationExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Aggregate number of common shares reserved for future issuance.

+ 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 210.5-02.29)

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

+ Details

Name:	us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Unrecognized cost of unvested share-based compensation awards.

+ 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 (i)

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

+ Details

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

- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

+ Details

Name:	us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the equity-based award expires, in CCYY-MM-DD format.

+ 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 (a)(2)

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

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Gross number of share options (or share units) granted during the period.

+ References

No definition available.

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_OptionIndexedToIssuersEquityTypeAxis=sgbx_TwoThousandElevenPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_OptionIndexedToIssuersEquityTypeAxis=sgbx_TwoThousandFourteenStockPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_OptionIndexedToIssuersEquityTypeAxis=sgbx_TwoThousandThirteenStockPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TitleOfIndividualAxis=us-gaap_BoardOfDirectorsChairmanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Stock Options and Grants (Details Textual) (USD $)	3 Months Ended		1 Months Ended			0 Months Ended
Stock Options and Grants (Details Textual) (USD $)	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2012	Jul. 27, 2011	Nov. 30, 2013	Jul. 15, 2014	Dec. 31, 2014
Stock Options and Grants (Textual)
Stock-based compensation expense, recognized	$ 48,115	$ 30,695
Unrecognized compensation costs related to non-vested stock options	$ 267,318
Weighted average period for unrecognized compensation costs to be expensed	1 year 3 months 29 days
Fair value of stock options	$ 0.09sgbx_FairValueOfStockOptions						$ 0.14sgbx_FairValueOfStockOptions
2012 Board Equity Authorization [Member]
Stock Options and Grants (Textual)
Issuance of additional shares of common stock in form of restricted stock or option			2,000,000
Common stock available for issuance			66,071
2011 Plan [Member]
Stock Options and Grants (Textual)
Number of common stock to be granted to the eligible officers, directors, employees, consultants, advisors, maximum				8,000,000
Stock option plan maturity date				Jul. 26, 2021
Number of common stock available for issuance	3,928
Common stock available for issuance	66,071
2013 Stock Plan [Member]
Stock Options and Grants (Textual)
Issuance of additional shares of common stock in form of restricted stock or option					2,000,000
Common stock available for issuance	1,600,000
2014 Plan [Member]
Stock Options and Grants (Textual)
Granted, Shares						12,000,000
Expiration of plan						Jul. 14, 2024
Common stock available for issuance	6,792,500