Costs and Estimated Earnings on Uncompleted Contracts (Details Textual) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Costs and Estimated Earnings On Uncompleted Contracts (Textual)
Accrued anticipated losses on uncompleted contracts	$ 58,433	$ 6,680

Accrued anticipated losses on uncompleted contracts.

No definition available.

Name:	sgbx_AccruedAnticipatedLossesOnUncompletedContracts
Namespace Prefix:	sgbx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant