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Consolidated Statements of Cash Flows (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Cash flows from operating expenses:    
Net loss $ (1,537,315)us-gaap_NetIncomeLoss $ (2,163,302)us-gaap_NetIncomeLoss
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation expense 3,978us-gaap_Depreciation 2,982us-gaap_Depreciation
Amortization of debt issuance costs 59,574us-gaap_AmortizationOfFinancingCosts 89,660us-gaap_AmortizationOfFinancingCosts
Accretion of discount on convertible debentures 718,640us-gaap_AccretionOfDiscount 436,947us-gaap_AccretionOfDiscount
Interest income on short-term investment (24)us-gaap_InvestmentIncomeInterest (126)us-gaap_InvestmentIncomeInterest
Change in fair value of financial instruments (1,386,469)us-gaap_IncreaseDecreaseInFinancialInstrumentsUsedInOperatingActivities (358,973)us-gaap_IncreaseDecreaseInFinancialInstrumentsUsedInOperatingActivities
Stock-based compensation 294,067us-gaap_ShareBasedCompensation 421,305us-gaap_ShareBasedCompensation
Issuance of common stock for services    165,750us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims
Bad debts expense 36,099us-gaap_ProvisionForLoanAndLeaseLosses 70,960us-gaap_ProvisionForLoanAndLeaseLosses
Cancellation of trade liabilities and unpaid interest    (25,530)us-gaap_IncreaseDecreaseInOtherOperatingLiabilities
Loss on extinguishment of debt 1,104,179us-gaap_GainsLossesOnExtinguishmentOfDebt   
Return of unvested consultant stock (45,000)sgbx_ReturnVestingConsultantStock   
Changes in operating assets and liabilities:    
Accounts receivable 44,487us-gaap_IncreaseDecreaseInAccountsReceivable (33,084)us-gaap_IncreaseDecreaseInAccountsReceivable
Costs and estimated earnings in excess of billings on uncompleted contracts    36,476us-gaap_IncreaseDecreaseInUnbilledReceivables
Inventory (164,918)us-gaap_IncreaseDecreaseInInventories 13,959us-gaap_IncreaseDecreaseInInventories
Prepaid expenses and other current assets 7,776us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets (14,088)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Accounts payable and accrued expenses 22,064us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities (11,405)us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities
Accrued interest, related party 8,197us-gaap_IncreaseDecreaseInDueToOtherRelatedPartiesCurrent 8,197us-gaap_IncreaseDecreaseInDueToOtherRelatedPartiesCurrent
Accrued interest (9,458)us-gaap_IncreaseDecreaseInInterestPayableNet 9,458us-gaap_IncreaseDecreaseInInterestPayableNet
Related party accounts payable and accrued expenses (112,377)us-gaap_IncreaseDecreaseInAccountsPayableRelatedParties 142,002us-gaap_IncreaseDecreaseInAccountsPayableRelatedParties
Billings in excess of costs and estimated earnings on uncompleted contracts (20,849)us-gaap_IncreaseDecreaseInBillingInExcessOfCostOfEarnings (45,440)us-gaap_IncreaseDecreaseInBillingInExcessOfCostOfEarnings
Deferred revenue (76,338)us-gaap_IncreaseDecreaseInDeferredRevenue 178,648us-gaap_IncreaseDecreaseInDeferredRevenue
Net cash used in operating activities (1,053,687)us-gaap_NetCashProvidedByUsedInOperatingActivities (1,075,604)us-gaap_NetCashProvidedByUsedInOperatingActivities
Cash flows used in investing activities    
Security deposit (3,900)us-gaap_PaymentsForProceedsFromDepositOnLoan (12,000)us-gaap_PaymentsForProceedsFromDepositOnLoan
Purchase of equipment (3,068)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment (8,786)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Net cash used in investing activities (6,968)us-gaap_NetCashProvidedByUsedInInvestingActivities (20,786)us-gaap_NetCashProvidedByUsedInInvestingActivities
Cash flows from financing activities:    
Expenditures on debt issuance costs (40,763)sgbx_ExpendituresOnDebtIssuanceCost (28,000)sgbx_ExpendituresOnDebtIssuanceCost
Proceeds from excercise of common stock options 22,500us-gaap_ProceedsFromStockOptionsExercised   
Proceeds from issuance of convertible debentures and warrants 1,760,858us-gaap_ProceedsFromConvertibleDebt 850,000us-gaap_ProceedsFromConvertibleDebt
Principal payments of convertible debentures (392,000)sgbx_PaymentsForDebenture   
Net cash provided by financing activities 1,350,595us-gaap_NetCashProvidedByUsedInFinancingActivities 822,000us-gaap_NetCashProvidedByUsedInFinancingActivities
Effect of exchange rate changes in cash    571us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
Net increase (decrease) in cash 289,940us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease (273,819)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents - beginning of year 594,248us-gaap_CashAndCashEquivalentsAtCarryingValue  
Cash and cash equivalents - end of year 884,188us-gaap_CashAndCashEquivalentsAtCarryingValue 594,248us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash paid during the year/period for:    
Interest 209,966us-gaap_InterestPaidNet 144,893us-gaap_InterestPaidNet
Supplemental disclosure of non-cash financing activities:    
In connection with the issuance of convertible debentures, $40,000 was paid for accrued interest and $24,142 was paid for debt issuance costs.      
Issuance of common stock for settlement of debt $ 25,000sgbx_IssuanceOfCommonStockForSettlementOfDebt