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Warrants (Details Textual) (USD $)
3 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Apr. 30, 2013
Dec. 31, 2013
May 31, 2012
Mar. 31, 2012
Warrants (Textual)              
Change in fair value of financial instruments $ 385,891us-gaap_GainLossOnDerivativeInstrumentsNetPretax $ (80,215)us-gaap_GainLossOnDerivativeInstrumentsNetPretax          
Hillair Capital Investments Lp [Member]              
Warrants (Textual)              
Number of common stock entitle in warrants 2,604,651us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ dei_LegalEntityAxis
= sgbx_HillairCapitalInvestmentsLpMember
           
Number of common stock entitle in warrants one     5,107,200sgbx_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRightsOne
/ dei_LegalEntityAxis
= sgbx_HillairCapitalInvestmentsLpMember
       
Investment Warrants, Exercise Price $ 0.4488invest_InvestmentWarrantsExercisePrice
/ dei_LegalEntityAxis
= sgbx_HillairCapitalInvestmentsLpMember
           
Investment warrants exercise price one     $ 0.275sgbx_InvestmentWarrantsExercisePriceOne
/ dei_LegalEntityAxis
= sgbx_HillairCapitalInvestmentsLpMember
       
Expiration date of warrants Jun. 27, 2018            
Fair value of warrants 40,320sgbx_FairValueOfWarrantsUnderAffiliates
/ dei_LegalEntityAxis
= sgbx_HillairCapitalInvestmentsLpMember
  96,931sgbx_FairValueOfWarrantsUnderAffiliates
/ dei_LegalEntityAxis
= sgbx_HillairCapitalInvestmentsLpMember
       
Merriman Capital Inc [Member]              
Warrants (Textual)              
Fair value of warrants 2,858sgbx_FairValueOfWarrantsUnderAffiliates
/ dei_LegalEntityAxis
= sgbx_MerrimanCapitalIncMember
           
Frank Casano [Member]              
Warrants (Textual)              
Number of common stock entitle in warrants       1,041,861us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ dei_LegalEntityAxis
= sgbx_FrankCasanoMember
     
Number of common stock entitle in warrants one     2,042,880sgbx_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRightsOne
/ dei_LegalEntityAxis
= sgbx_FrankCasanoMember
       
Investment Warrants, Exercise Price       $ 0.4488invest_InvestmentWarrantsExercisePrice
/ dei_LegalEntityAxis
= sgbx_FrankCasanoMember
     
Investment warrants exercise price one     $ 0.275sgbx_InvestmentWarrantsExercisePriceOne
/ dei_LegalEntityAxis
= sgbx_FrankCasanoMember
       
Fair value of warrants 22,400sgbx_FairValueOfWarrantsUnderAffiliates
/ dei_LegalEntityAxis
= sgbx_FrankCasanoMember
  51,153sgbx_FairValueOfWarrantsUnderAffiliates
/ dei_LegalEntityAxis
= sgbx_FrankCasanoMember
       
Shares of common stock is entitled to purchase in connection with the exchange agreement       1,792,000sgbx_ShareBasedCompensationArrangementByShareBasedPaymentAwardPurchaseOfCommonStock
/ dei_LegalEntityAxis
= sgbx_FrankCasanoMember
     
Shares issued, price per share       $ 0.25us-gaap_SharesIssuedPricePerShare
/ dei_LegalEntityAxis
= sgbx_FrankCasanoMember
     
Masterson [Member]              
Warrants (Textual)              
Number of common stock entitle in warrants       260,465us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ dei_LegalEntityAxis
= sgbx_MastersonMember
     
Number of common stock entitle in warrants one     510,720sgbx_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRightsOne
/ dei_LegalEntityAxis
= sgbx_MastersonMember
       
Investment Warrants, Exercise Price       $ 0.4488invest_InvestmentWarrantsExercisePrice
/ dei_LegalEntityAxis
= sgbx_MastersonMember
     
Investment warrants exercise price one     $ 0.275sgbx_InvestmentWarrantsExercisePriceOne
/ dei_LegalEntityAxis
= sgbx_MastersonMember
       
Fair value of warrants 22,400sgbx_FairValueOfWarrantsUnderAffiliates
/ dei_LegalEntityAxis
= sgbx_MastersonMember
  51,153sgbx_FairValueOfWarrantsUnderAffiliates
/ dei_LegalEntityAxis
= sgbx_MastersonMember
       
Shares of common stock is entitled to purchase in connection with the exchange agreement       448,000sgbx_ShareBasedCompensationArrangementByShareBasedPaymentAwardPurchaseOfCommonStock
/ dei_LegalEntityAxis
= sgbx_MastersonMember
     
Shares issued, price per share       $ 0.25us-gaap_SharesIssuedPricePerShare
/ dei_LegalEntityAxis
= sgbx_MastersonMember
     
Warrant [Member]              
Warrants (Textual)              
Expiration date of warrants     Apr. 10, 2019        
Fair value of warrants 84,269sgbx_FairValueOfWarrantsUnderAffiliates
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
  167,969sgbx_FairValueOfWarrantsUnderAffiliates
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
       
Change in fair value of financial instruments 283,882us-gaap_GainLossOnDerivativeInstrumentsNetPretax
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
80,598us-gaap_GainLossOnDerivativeInstrumentsNetPretax
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
         
New Warrant [Member]              
Warrants (Textual)              
Number of common stock entitle in warrants     8,322,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_AwardTypeAxis
= sgbx_NewWarrantMember
       
Investment Warrants, Exercise Price     $ 0.275invest_InvestmentWarrantsExercisePrice
/ us-gaap_AwardTypeAxis
= sgbx_NewWarrantMember
       
Fair value of warrants 91,542sgbx_FairValueOfWarrantsUnderAffiliates
/ us-gaap_AwardTypeAxis
= sgbx_NewWarrantMember
  182,466sgbx_FairValueOfWarrantsUnderAffiliates
/ us-gaap_AwardTypeAxis
= sgbx_NewWarrantMember
       
2012 Hillair Debenture One [Member] | Hillair Capital Investments Lp [Member]              
Warrants (Textual)              
Number of common stock entitle in warrants 4,480,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ sgbx_DebtIssuanceAxis
= sgbx_ConvertibleDebtIssuanceOneMember
/ dei_LegalEntityAxis
= sgbx_HillairCapitalInvestmentsLpMember
           
Shares issued, price per share $ 0.25us-gaap_SharesIssuedPricePerShare
/ sgbx_DebtIssuanceAxis
= sgbx_ConvertibleDebtIssuanceOneMember
/ dei_LegalEntityAxis
= sgbx_HillairCapitalInvestmentsLpMember
           
2012 Hillair Debenture One [Member] | Merriman Capital Inc [Member]              
Warrants (Textual)              
Number of common stock entitle in warrants 52,093us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ sgbx_DebtIssuanceAxis
= sgbx_ConvertibleDebtIssuanceOneMember
/ dei_LegalEntityAxis
= sgbx_MerrimanCapitalIncMember
           
Number of common stock entitle in warrants one 52,093sgbx_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRightsOne
/ sgbx_DebtIssuanceAxis
= sgbx_ConvertibleDebtIssuanceOneMember
/ dei_LegalEntityAxis
= sgbx_MerrimanCapitalIncMember
           
Investment Warrants, Exercise Price $ 0.4488invest_InvestmentWarrantsExercisePrice
/ sgbx_DebtIssuanceAxis
= sgbx_ConvertibleDebtIssuanceOneMember
/ dei_LegalEntityAxis
= sgbx_MerrimanCapitalIncMember
           
Investment warrants exercise price one $ 0.43sgbx_InvestmentWarrantsExercisePriceOne
/ sgbx_DebtIssuanceAxis
= sgbx_ConvertibleDebtIssuanceOneMember
/ dei_LegalEntityAxis
= sgbx_MerrimanCapitalIncMember
           
Fair value of warrants 8,166sgbx_FairValueOfWarrantsUnderAffiliates
/ sgbx_DebtIssuanceAxis
= sgbx_ConvertibleDebtIssuanceOneMember
/ dei_LegalEntityAxis
= sgbx_MerrimanCapitalIncMember
           
2012 Hillair Debenture One [Member] | Next View Capital [Member]              
Warrants (Textual)              
Number of common stock entitle in warrants 1,120,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ sgbx_DebtIssuanceAxis
= sgbx_ConvertibleDebtIssuanceOneMember
/ dei_LegalEntityAxis
= sgbx_NextViewCapitalMember
           
Number of common stock entitle in warrants one 448,000sgbx_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRightsOne
/ sgbx_DebtIssuanceAxis
= sgbx_ConvertibleDebtIssuanceOneMember
/ dei_LegalEntityAxis
= sgbx_NextViewCapitalMember
           
Shares issued, price per share $ 0.25us-gaap_SharesIssuedPricePerShare
/ sgbx_DebtIssuanceAxis
= sgbx_ConvertibleDebtIssuanceOneMember
/ dei_LegalEntityAxis
= sgbx_NextViewCapitalMember
           
2012 Hillair Debenture Two [Member] | Merriman Capital Inc [Member]              
Warrants (Textual)              
Number of common stock entitle in warrants 18,233us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ sgbx_DebtIssuanceAxis
= sgbx_ConvertibleDebtIssuanceTwoMember
/ dei_LegalEntityAxis
= sgbx_MerrimanCapitalIncMember
           
Number of common stock entitle in warrants one 18,233sgbx_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRightsOne
/ sgbx_DebtIssuanceAxis
= sgbx_ConvertibleDebtIssuanceTwoMember
/ dei_LegalEntityAxis
= sgbx_MerrimanCapitalIncMember
           
Investment Warrants, Exercise Price $ 0.4488invest_InvestmentWarrantsExercisePrice
/ sgbx_DebtIssuanceAxis
= sgbx_ConvertibleDebtIssuanceTwoMember
/ dei_LegalEntityAxis
= sgbx_MerrimanCapitalIncMember
           
Investment warrants exercise price one $ 0.43sgbx_InvestmentWarrantsExercisePriceOne
/ sgbx_DebtIssuanceAxis
= sgbx_ConvertibleDebtIssuanceTwoMember
/ dei_LegalEntityAxis
= sgbx_MerrimanCapitalIncMember
           
Fair value of warrants 2,858sgbx_FairValueOfWarrantsUnderAffiliates
/ sgbx_DebtIssuanceAxis
= sgbx_ConvertibleDebtIssuanceTwoMember
/ dei_LegalEntityAxis
= sgbx_MerrimanCapitalIncMember
           
2012 Hillair Debenture Two [Member] | Next View Capital [Member]              
Warrants (Textual)              
Number of common stock entitle in warrants 651,163us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ sgbx_DebtIssuanceAxis
= sgbx_ConvertibleDebtIssuanceTwoMember
/ dei_LegalEntityAxis
= sgbx_NextViewCapitalMember
           
Investment Warrants, Exercise Price $ 0.4488invest_InvestmentWarrantsExercisePrice
/ sgbx_DebtIssuanceAxis
= sgbx_ConvertibleDebtIssuanceTwoMember
/ dei_LegalEntityAxis
= sgbx_NextViewCapitalMember
           
Fair value of warrants 14,112sgbx_FairValueOfWarrantsUnderAffiliates
/ sgbx_DebtIssuanceAxis
= sgbx_ConvertibleDebtIssuanceTwoMember
/ dei_LegalEntityAxis
= sgbx_NextViewCapitalMember
  33,926sgbx_FairValueOfWarrantsUnderAffiliates
/ sgbx_DebtIssuanceAxis
= sgbx_ConvertibleDebtIssuanceTwoMember
/ dei_LegalEntityAxis
= sgbx_NextViewCapitalMember
       
Fair value of excercise price warrants per share         $ 0.23sgbx_FairValueOfExcercisePriceWarrantsPerShare
/ sgbx_DebtIssuanceAxis
= sgbx_ConvertibleDebtIssuanceTwoMember
/ dei_LegalEntityAxis
= sgbx_NextViewCapitalMember
   
2012 Hillair Debenture Two [Member] | Another Investor [Member]              
Warrants (Textual)              
Number of common stock entitle in warrants 260,465us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ sgbx_DebtIssuanceAxis
= sgbx_ConvertibleDebtIssuanceTwoMember
/ dei_LegalEntityAxis
= sgbx_AnotherInvestorMember
           
Investment Warrants, Exercise Price $ 0.4488invest_InvestmentWarrantsExercisePrice
/ sgbx_DebtIssuanceAxis
= sgbx_ConvertibleDebtIssuanceTwoMember
/ dei_LegalEntityAxis
= sgbx_AnotherInvestorMember
           
Fair value of warrants 14,112sgbx_FairValueOfWarrantsUnderAffiliates
/ sgbx_DebtIssuanceAxis
= sgbx_ConvertibleDebtIssuanceTwoMember
/ dei_LegalEntityAxis
= sgbx_AnotherInvestorMember
  33,926sgbx_FairValueOfWarrantsUnderAffiliates
/ sgbx_DebtIssuanceAxis
= sgbx_ConvertibleDebtIssuanceTwoMember
/ dei_LegalEntityAxis
= sgbx_AnotherInvestorMember
       
Fair value of excercise price warrants per share         $ 0.23sgbx_FairValueOfExcercisePriceWarrantsPerShare
/ sgbx_DebtIssuanceAxis
= sgbx_ConvertibleDebtIssuanceTwoMember
/ dei_LegalEntityAxis
= sgbx_AnotherInvestorMember
   
2010 Private Placement [Member]              
Warrants (Textual)              
Number of common stock entitle in warrants 1,044,584us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_SubsidiarySaleOfStockAxis
= sgbx_TwoThousandTenPrivatePlacementMember
           
Investment Warrants, Exercise Price $ 0.25invest_InvestmentWarrantsExercisePrice
/ us-gaap_SubsidiarySaleOfStockAxis
= sgbx_TwoThousandTenPrivatePlacementMember
           
Expiration date of warrants Oct. 28, 2015            
Fair value of warrants 0sgbx_FairValueOfWarrantsUnderAffiliates
/ us-gaap_SubsidiarySaleOfStockAxis
= sgbx_TwoThousandTenPrivatePlacementMember
  3,476sgbx_FairValueOfWarrantsUnderAffiliates
/ us-gaap_SubsidiarySaleOfStockAxis
= sgbx_TwoThousandTenPrivatePlacementMember
       
2012 Private Placement [Member]              
Warrants (Textual)              
Number of common stock entitle in warrants           29,700us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_SubsidiarySaleOfStockAxis
= sgbx_TwoThousandTwelvePrivatePlacementMember
86,323us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_SubsidiarySaleOfStockAxis
= sgbx_TwoThousandTwelvePrivatePlacementMember
Investment Warrants, Exercise Price           $ 0.35invest_InvestmentWarrantsExercisePrice
/ us-gaap_SubsidiarySaleOfStockAxis
= sgbx_TwoThousandTwelvePrivatePlacementMember
$ 0.35invest_InvestmentWarrantsExercisePrice
/ us-gaap_SubsidiarySaleOfStockAxis
= sgbx_TwoThousandTwelvePrivatePlacementMember
Expiration date of warrants           May 22, 2017 Mar. 27, 2017
Fair value of warrants $ 146sgbx_FairValueOfWarrantsUnderAffiliates
/ us-gaap_SubsidiarySaleOfStockAxis
= sgbx_TwoThousandTwelvePrivatePlacementMember
  $ 750sgbx_FairValueOfWarrantsUnderAffiliates
/ us-gaap_SubsidiarySaleOfStockAxis
= sgbx_TwoThousandTwelvePrivatePlacementMember
       
Additional shares issued in connection with plan           702,872us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherShareIncreaseDecrease
/ us-gaap_SubsidiarySaleOfStockAxis
= sgbx_TwoThousandTwelvePrivatePlacementMember