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Convertible Debentures (Details Textual) (USD $)	0 Months Ended	3 Months Ended
	Apr. 10, 2014	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Convertible Debentures (Textual)
Interest rate on convertible debenture	8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
Due date of convertible debentures	Apr. 01, 2016
Amount of discount on debentures	$ 532,944us-gaap_DebtInstrumentUnamortizedDiscount
Total amortization relating to the discount		101,208us-gaap_AmortizationOfFinancingCostsAndDiscounts	117,723us-gaap_AmortizationOfFinancingCostsAndDiscounts
Conversion price	$ 0.25us-gaap_DebtInstrumentConvertibleConversionPrice1
Legal fees		20,763us-gaap_LegalFees
Fair value of conversion option liabilities	490,601sgbx_FairValueOfConversionOptionLiabilities	7,991sgbx_FairValueOfConversionOptionLiabilities		110,000sgbx_FairValueOfConversionOptionLiabilities
Interest expense on the convertible debentures		79,914us-gaap_InterestExpenseDebtExcludingAmortization	41,440us-gaap_InterestExpenseDebtExcludingAmortization
Covertible debentures maturity value	1,915,200sgbx_DebenturesStatedMaturityValue
Converion price, description	The Exchange Agreement and the 2014 SPA trigger anti-dilution adjustments to the warrants issued on the Existing Debentures based on a $0.25 per share conversion price (adjusted from the original stated conversion price of $0.43 per share), which reduces the exercise price to $0.25 per share and increases the number of shares issuable upon the exercise of the Existing Warrants from 4,818,605 to 8,288,000 shares.
Debt default description		Upon any Event of Default (as defined in the Debenture), the outstanding principal amount of the Debenture, plus liquidated damages, interest, a premium of 30% and other amounts owing in respect thereof through the date of acceleration, shall become, at the 2014 Holders' election, immediately due and payable in cash. Commencing five days after the occurrence of any Event of Default, the interest rate on the Debenture shall accrue at an interest rate equal to the lesser of 18% per annum or the maximum rate permitted under applicable law.
Debt Instrument, Redemption, Period One [Member]
Convertible Debentures (Textual)
Debt redemption amount		998,925sgbx_DebtInstrumentPeriodicRedemptionAmount / us-gaap_DebtInstrumentRedemptionPeriodAxis = us-gaap_DebtInstrumentRedemptionPeriodOneMember
Debt Instrument, Redemption, Period Two [Member]
Convertible Debentures (Textual)
Debt redemption amount		998,925sgbx_DebtInstrumentPeriodicRedemptionAmount / us-gaap_DebtInstrumentRedemptionPeriodAxis = us-gaap_DebtInstrumentRedemptionPeriodTwoMember
Debt Instrument, Redemption, Period Three [Member]
Convertible Debentures (Textual)
Debt redemption amount		1,997,850sgbx_DebtInstrumentPeriodicRedemptionAmount / us-gaap_DebtInstrumentRedemptionPeriodAxis = us-gaap_DebtInstrumentRedemptionPeriodThreeMember
Hillair Capital Investments Lp [Member]
Convertible Debentures (Textual)
Fair value of warrants		40,320sgbx_FairValueOfWarrantsUnderAffiliates / dei_LegalEntityAxis = sgbx_HillairCapitalInvestmentsLpMember		96,931sgbx_FairValueOfWarrantsUnderAffiliates / dei_LegalEntityAxis = sgbx_HillairCapitalInvestmentsLpMember
Merriman Capital Inc [Member]
Convertible Debentures (Textual)
Fair value of warrants		2,858sgbx_FairValueOfWarrantsUnderAffiliates / dei_LegalEntityAxis = sgbx_MerrimanCapitalIncMember
Frank Casano [Member]
Convertible Debentures (Textual)
Fair value of warrants		22,400sgbx_FairValueOfWarrantsUnderAffiliates / dei_LegalEntityAxis = sgbx_FrankCasanoMember		51,153sgbx_FairValueOfWarrantsUnderAffiliates / dei_LegalEntityAxis = sgbx_FrankCasanoMember
Senior Convertible Debentures [Member]
Convertible Debentures (Textual)
Convertible debentures	2,080,500us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = us-gaap_ConvertibleDebtSecuritiesMember
Interest rate on convertible debenture	8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = us-gaap_ConvertibleDebtSecuritiesMember
Due date of convertible debentures	Apr. 01, 2016
Proceeds from issuance of convertible debentures	1,825,000us-gaap_ProceedsFromIssuanceOfSecuredDebt / us-gaap_DebtInstrumentAxis = us-gaap_ConvertibleDebtSecuritiesMember
Warrant to purchase company's common stock	8,322,000sgbx_WarrantToPurchaseCommonStock / us-gaap_DebtInstrumentAxis = us-gaap_ConvertibleDebtSecuritiesMember
Amount of discount on debentures	255,500us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_DebtInstrumentAxis = us-gaap_ConvertibleDebtSecuritiesMember
Conversion price	$ 0.25us-gaap_DebtInstrumentConvertibleConversionPrice1 / us-gaap_DebtInstrumentAxis = us-gaap_ConvertibleDebtSecuritiesMember
Term of warrants	5 years
Warrants exercise price	$ 0.275us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_DebtInstrumentAxis = us-gaap_ConvertibleDebtSecuritiesMember
Percentage of conversion price	110.00%sgbx_PercentageOfConversionPrice / us-gaap_DebtInstrumentAxis = us-gaap_ConvertibleDebtSecuritiesMember
Legal fees	20,000us-gaap_LegalFees / us-gaap_DebtInstrumentAxis = us-gaap_ConvertibleDebtSecuritiesMember
Fair value of conversion option liabilities	413,606sgbx_FairValueOfConversionOptionLiabilities / us-gaap_DebtInstrumentAxis = us-gaap_ConvertibleDebtSecuritiesMember
Existing Debentures [Member]
Convertible Debentures (Textual)
Fair value of conversion option liabilities	2,366sgbx_FairValueOfConversionOptionLiabilities / us-gaap_DebtInstrumentAxis = sgbx_ExistingDebenturesMember
Fair value of warrants	490,601sgbx_FairValueOfWarrantsUnderAffiliates / us-gaap_DebtInstrumentAxis = sgbx_ExistingDebenturesMember
Securities Purchase Agreement [Member]
Convertible Debentures (Textual)
Debt instrument, covenant description		The underlying securities purchase and debenture agreements also provide for the Company to pay liquidated damages in the event of its failure to (i) deliver shares upon the conversion of the debentures, in which case the liquidated damages would amount to a cash payment of $10 per trading day (increasing to $15 per trading day on the fifth trading day) for each $1,000 of principal amount being converted until such certificates are delivered (ii) maintain timely required filings with the SEC, in which case the liquidated damages would amount to a cash payment of two percent (2.0%) of the aggregate subscription amount of such purchasers securities on the day of the failure to maintain timely filings with the SEC and on every thirtieth (30th) day thereafter until the required documents are filed with the SEC or is no longer required for the purchaser to transfer the underlying shares pursuant to Rule 144 and (iii) to compensate the debenture holder for a Buy-In (as defined in the debentures) of securities previously sold by the debenture holder on a failure to timely deliver certificates upon conversion by the debenture holder.
Securities Purchase Agreement [Member] | Senior Convertible Debentures [Member]
Convertible Debentures (Textual)
Amount of discount on debentures	413,606us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_DebtInstrumentAxis = us-gaap_ConvertibleDebtSecuritiesMember / us-gaap_PlanNameAxis = sgbx_SecuritiesPurchaseAgreementMember	691,590us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_DebtInstrumentAxis = us-gaap_ConvertibleDebtSecuritiesMember / us-gaap_PlanNameAxis = sgbx_SecuritiesPurchaseAgreementMember		792,798us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_DebtInstrumentAxis = us-gaap_ConvertibleDebtSecuritiesMember / us-gaap_PlanNameAxis = sgbx_SecuritiesPurchaseAgreementMember
Exchange Agreement [Member]
Convertible Debentures (Textual)
Interest rate on convertible debenture	8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_PlanNameAxis = sgbx_ExchangeAgreementMember
Warrant to purchase company's common stock	7,660,800sgbx_WarrantToPurchaseCommonStock / us-gaap_PlanNameAxis = sgbx_ExchangeAgreementMember
Conversion price	$ 0.25us-gaap_DebtInstrumentConvertibleConversionPrice1 / us-gaap_PlanNameAxis = sgbx_ExchangeAgreementMember
Term of warrants	5 years
Warrants exercise price	$ 0.275us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_PlanNameAxis = sgbx_ExchangeAgreementMember
Loss of transaction	1,104,179sgbx_GainLossOnDebtExchange / us-gaap_PlanNameAxis = sgbx_ExchangeAgreementMember
Percentage of conversion price	110.00%sgbx_PercentageOfConversionPrice / us-gaap_PlanNameAxis = sgbx_ExchangeAgreementMember
Fair value of conversion option liabilities	380,744sgbx_FairValueOfConversionOptionLiabilities / us-gaap_PlanNameAxis = sgbx_ExchangeAgreementMember
Covertible debentures maturity value	$ 1,680,000sgbx_DebenturesStatedMaturityValue / us-gaap_PlanNameAxis = sgbx_ExchangeAgreementMember

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