Condensed Consolidated Statements of Cash Flows (Parenthetical) (Unaudited) (USD $)	3 Months Ended
Mar. 31, 2013	Mar. 31, 2012
Statements Of Cash Flows [Abstract]
Payment for prior liability in connection with private offering	$ 50,000	$ 50,000

In connection with the private offering, $50,000 was paid for a prior liability which was included in accounts payable and accrued expenses

No definition available.

Name:	sgbx_PaymentForPriorLiabilityInConnectionWithPrivateOffering
Namespace Prefix:	sgbx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration