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Stockholders’ Deficiency (Details Narrative) (USD $)
6 Months Ended 1 Months Ended 3 Months Ended 6 Months Ended 34 Months Ended
Jan. 31, 2015
Jul. 31, 2014
Jun. 30, 2013
Jun. 30, 2014
Mar. 27, 2014
Jun. 17, 2013
Jun. 17, 2016
Jan. 14, 2014
Net proceeds from financing    $ 750,000us-gaap_ProceedsFromIssuanceOfPreferredStockAndPreferenceStock            
Shares of common stock 66,369us-gaap_CommonStockValue 778,512us-gaap_CommonStockValue            
Accounts payable and accrued expenses 7,534,169us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent 8,034,122us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent            
Series E Convertible Preferred Stock                
Convertible preferred stock, shares authorized 2,450us-gaap_PreferredStockSharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesEPreferredStockMember
2,450us-gaap_PreferredStockSharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesEPreferredStockMember
           
Convertible preferred stock, cumulative percentage of interest 9.00%GNBT_ConvertiblePreferredStockPercentageOfInterest
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesEPreferredStockMember
9.00%GNBT_ConvertiblePreferredStockPercentageOfInterest
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesEPreferredStockMember
           
Convertible preferred stock, par value (in dollars per share) $ 1,000us-gaap_PreferredStockParOrStatedValuePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesEPreferredStockMember
$ 1,000us-gaap_PreferredStockParOrStatedValuePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesEPreferredStockMember
           
Convertible preferred stock, shares issued 25us-gaap_PreferredStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesEPreferredStockMember
25us-gaap_PreferredStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesEPreferredStockMember
           
Common stock issued upon conversion of preferred stock 66,666,666us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesEPreferredStockMember
             
Common stock issued as "make-whole payments" on conversions of preferred stock 18,585,193us-gaap_SharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesEPreferredStockMember
             
Convertible preferred stock conversion price     $ 0.03GNBT_ConvertiblePreferredStockConversionPrice
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesEPreferredStockMember
         
Net proceeds from financing 750,000us-gaap_ProceedsFromIssuanceOfPreferredStockAndPreferenceStock
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesEPreferredStockMember
             
Conversion of preferred stock 2,025us-gaap_ConversionOfStockAmountIssued1
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesEPreferredStockMember
             
Conversion of stock, amount converted 2,000us-gaap_ConversionOfStockAmountConverted1
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesEPreferredStockMember
             
Warrants issued to investors     40,833,335GNBT_WarrantsIssuedToInvestors
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesEPreferredStockMember
         
Initial "Make-whole payments" 216,000GNBT_InitialMakewholePayments
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesEPreferredStockMember
             
"Make-whole payments", value 6,750GNBT_MakewholePaymentsValue
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesEPreferredStockMember
             
Series F Convertible Preferred Stock                
Convertible preferred stock, shares authorized 4,150us-gaap_PreferredStockSharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesFPreferredStockMember
4,150us-gaap_PreferredStockSharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesFPreferredStockMember
    4,150us-gaap_PreferredStockSharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesFPreferredStockMember
     
Convertible preferred stock, cumulative percentage of interest 9.00%GNBT_ConvertiblePreferredStockPercentageOfInterest
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesFPreferredStockMember
9.00%GNBT_ConvertiblePreferredStockPercentageOfInterest
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesFPreferredStockMember
    9.00%GNBT_ConvertiblePreferredStockPercentageOfInterest
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesFPreferredStockMember
     
Convertible preferred stock, par value (in dollars per share) $ 1,000us-gaap_PreferredStockParOrStatedValuePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesFPreferredStockMember
$ 1,000us-gaap_PreferredStockParOrStatedValuePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesFPreferredStockMember
    $ 1,000us-gaap_PreferredStockParOrStatedValuePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesFPreferredStockMember
     
Convertible preferred stock, shares issued 1,008us-gaap_PreferredStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesFPreferredStockMember
1,225us-gaap_PreferredStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesFPreferredStockMember
    2,075us-gaap_PreferredStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesFPreferredStockMember
     
Common stock issued upon conversion of preferred stock 35,558,332us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesFPreferredStockMember
      69,166,667us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesFPreferredStockMember
     
Common stock issued as "make-whole payments" on conversions of preferred stock 10,661,025us-gaap_SharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesFPreferredStockMember
             
Convertible preferred stock conversion price         $ 0.03GNBT_ConvertiblePreferredStockConversionPrice
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesFPreferredStockMember
     
Net proceeds from financing 2,020,000us-gaap_ProceedsFromIssuanceOfPreferredStockAndPreferenceStock
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesFPreferredStockMember
      2,020,000us-gaap_ProceedsFromIssuanceOfPreferredStockAndPreferenceStock
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesFPreferredStockMember
     
Preferred stock, dividend rate percentage       3.00%us-gaap_PreferredStockDividendRatePercentage
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesFPreferredStockMember
       
Conversion of preferred stock 2,075us-gaap_ConversionOfStockAmountIssued1
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesFPreferredStockMember
             
Conversion of stock, amount converted 1,067us-gaap_ConversionOfStockAmountConverted1
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesFPreferredStockMember
             
Warrants issued to investors       69,166,667GNBT_WarrantsIssuedToInvestors
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesFPreferredStockMember
       
Aggregate subscription amount, maximum         2,075,000us-gaap_TemporaryEquitySharesSubscribedButUnissuedSubscriptionsReceivable
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesFPreferredStockMember
     
Initial "Make-whole payments" 560,250GNBT_InitialMakewholePayments
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesFPreferredStockMember
             
"Make-whole payments", value 272,227GNBT_MakewholePaymentsValue
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesFPreferredStockMember
             
Series E Convertible Preferred Stock                
Convertible preferred stock, shares authorized           2,450us-gaap_PreferredStockSharesAuthorized
/ us-gaap_ConversionOfStockByUniqueDescriptionAxis
= us-gaap_SeriesEPreferredStockMember
   
Convertible preferred stock, cumulative percentage of interest           9.00%GNBT_ConvertiblePreferredStockPercentageOfInterest
/ us-gaap_ConversionOfStockByUniqueDescriptionAxis
= us-gaap_SeriesEPreferredStockMember
   
Convertible preferred stock, par value (in dollars per share)           $ 1,000us-gaap_PreferredStockParOrStatedValuePerShare
/ us-gaap_ConversionOfStockByUniqueDescriptionAxis
= us-gaap_SeriesEPreferredStockMember
   
Convertible preferred stock, shares issued           1,225us-gaap_PreferredStockSharesIssued
/ us-gaap_ConversionOfStockByUniqueDescriptionAxis
= us-gaap_SeriesEPreferredStockMember
   
Common shares attributable to conversion of preferred stock           40,833,335us-gaap_IncrementalCommonSharesAttributableToConversionOfPreferredStock
/ us-gaap_ConversionOfStockByUniqueDescriptionAxis
= us-gaap_SeriesEPreferredStockMember
   
Convertible preferred stock conversion price             $ 0.03GNBT_ConvertiblePreferredStockConversionPrice
/ us-gaap_ConversionOfStockByUniqueDescriptionAxis
= us-gaap_SeriesEPreferredStockMember
 
Net proceeds from financing           1,165,000us-gaap_ProceedsFromIssuanceOfPreferredStockAndPreferenceStock
/ us-gaap_ConversionOfStockByUniqueDescriptionAxis
= us-gaap_SeriesEPreferredStockMember
   
Common stock, effective conversion price             $ 0.03GNBT_CommonStockEffectiveConversionPrice
/ us-gaap_ConversionOfStockByUniqueDescriptionAxis
= us-gaap_SeriesEPreferredStockMember
 
Preferred stock, dividend rate percentage             9.00%us-gaap_PreferredStockDividendRatePercentage
/ us-gaap_ConversionOfStockByUniqueDescriptionAxis
= us-gaap_SeriesEPreferredStockMember
 
Conversion of preferred stock           295us-gaap_ConversionOfStockAmountIssued1
/ us-gaap_ConversionOfStockByUniqueDescriptionAxis
= us-gaap_SeriesEPreferredStockMember
270us-gaap_ConversionOfStockAmountIssued1
/ us-gaap_ConversionOfStockByUniqueDescriptionAxis
= us-gaap_SeriesEPreferredStockMember
 
Conversion of stock, amount converted             1,000us-gaap_ConversionOfStockAmountConverted1
/ us-gaap_ConversionOfStockByUniqueDescriptionAxis
= us-gaap_SeriesEPreferredStockMember
 
Warrants issued to investors           26,666,668GNBT_WarrantsIssuedToInvestors
/ us-gaap_ConversionOfStockByUniqueDescriptionAxis
= us-gaap_SeriesEPreferredStockMember
   
Aggregate subscription amount, maximum           1,225,000us-gaap_TemporaryEquitySharesSubscribedButUnissuedSubscriptionsReceivable
/ us-gaap_ConversionOfStockByUniqueDescriptionAxis
= us-gaap_SeriesEPreferredStockMember
   
Series E Convertible Preferred Stock                
Convertible preferred stock, cumulative percentage of interest               9.00%GNBT_ConvertiblePreferredStockPercentageOfInterest
/ us-gaap_ClassOfWarrantOrRightAxis
= us-gaap_SeriesEPreferredStockMember
Convertible preferred shares sold               800GNBT_ConvertiblePreferredSharesSold
/ us-gaap_ClassOfWarrantOrRightAxis
= us-gaap_SeriesEPreferredStockMember
Shares of common stock               $ 26,666,668us-gaap_CommonStockValue
/ us-gaap_ClassOfWarrantOrRightAxis
= us-gaap_SeriesEPreferredStockMember