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Income Taxes (Details) (USD $)	12 Months Ended
Income Taxes (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Deferred:
Federal	$ (426,761)	$ (692,787)
State and local	(71,638)	(389,582)
Total deferred	(498,399)us-gaap_DeferredIncomeTaxExpenseBenefit	(1,082,369)us-gaap_DeferredIncomeTaxExpenseBenefit
Total benefit for income taxes	(498,399)us-gaap_IncomeTaxExpenseBenefit	(1,082,369)us-gaap_IncomeTaxExpenseBenefit
Less: valuation reserve	498,399sgbx_AmountOfValuationReserve	1,082,369sgbx_AmountOfValuationReserve
Income Tax provision

Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations.