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Condensed Consolidated Statements of Cash Flows (Parenthetical) (Unaudited) (USD $) | 6 Months Ended
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Jun. 30, 2013 | Jun. 30, 2012
Statements of Cash Flows [Abstract] |  |
Payment for prior liability in connection with private offering | $ 80,000 | $ 80,000

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- Definition In connection with the private offering, $50,000 was paid for a prior liability which was included in accounts payable and accrued expenses + References No definition available. + Details
Name: | sgbx_PaymentForPriorLiabilityInConnectionWithPrivateOffering
Namespace Prefix: | sgbx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | us-gaap_StatementOfCashFlowsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration