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Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
Mar. 31, 2015
Dec. 31, 2014
Balance Sheets [Abstract]    
Discount on convertible debt current $ 691,590sgbx_DebtInstrumentConvertibleCurrentDiscount $ 198,200sgbx_DebtInstrumentConvertibleCurrentDiscount
Discount on convertible debt noncurrent   $ 594,598sgbx_DebtInstrumentConvertibleNonCurrentDiscount
Preferred stock, par value $ 0.01us-gaap_PreferredStockParOrStatedValuePerShare $ 0.01us-gaap_PreferredStockParOrStatedValuePerShare
Preferred stock, shares authorized 5,000,000us-gaap_PreferredStockSharesAuthorized 5,000,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares issued 0us-gaap_PreferredStockSharesIssued 0us-gaap_PreferredStockSharesIssued
Preferred stock, shares outstanding 0us-gaap_PreferredStockSharesOutstanding 0us-gaap_PreferredStockSharesOutstanding
Common stock, par value $ 0.01us-gaap_CommonStockParOrStatedValuePerShare $ 0.01us-gaap_CommonStockParOrStatedValuePerShare
Common stock, shares authorized 300,000,000us-gaap_CommonStockSharesAuthorized 300,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued 42,918,927us-gaap_CommonStockSharesIssued 42,918,927us-gaap_CommonStockSharesIssued
Common stock, shares outstanding 42,918,927us-gaap_CommonStockSharesOutstanding 42,918,927us-gaap_CommonStockSharesOutstanding