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CONSOLIDATED BALANCE SHEETS (UNAUDITED) (USD $)
Apr. 30, 2015
Jul. 31, 2014
ASSETS    
Cash and cash equivalents $ 925,926us-gaap_CashAndCashEquivalentsAtCarryingValue $ 3,269,489us-gaap_CashAndCashEquivalentsAtCarryingValue
Other current assets 48,992us-gaap_OtherAssetsCurrent 201,314us-gaap_OtherAssetsCurrent
Total Current Assets 974,918us-gaap_AssetsCurrent 3,470,803us-gaap_AssetsCurrent
Property and Equipment, Net 3,520us-gaap_PropertyPlantAndEquipmentNet 5,293us-gaap_PropertyPlantAndEquipmentNet
Patents, Net 1,835,267us-gaap_FiniteLivedIntangibleAssetsNet 2,046,361us-gaap_FiniteLivedIntangibleAssetsNet
TOTAL ASSETS 2,813,705us-gaap_Assets 5,522,457us-gaap_Assets
LIABILITIES AND STOCKHOLDERS' DEFICIENCY    
Accounts payable and accrued expenses (Note 4) 7,622,479us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent 8,034,122us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent
Deferred revenue 223,662us-gaap_DeferredRevenueCurrent 223,662us-gaap_DeferredRevenueCurrent
Total Current Liabilities 7,846,141us-gaap_LiabilitiesCurrent 8,257,784us-gaap_LiabilitiesCurrent
Derivative Warrant Liability (Note 7 and 8) 2,689,240us-gaap_DerivativeLiabilitiesNoncurrent 2,635,643us-gaap_DerivativeLiabilitiesNoncurrent
Derivative Additional Investment Rights Liability (Note 7 and 8)    719,088GNBT_DerivativeAdditionalInvestmentRightsLiability
Total Liabilities 10,535,381us-gaap_Liabilities 11,612,515us-gaap_Liabilities
Stockholders' Deficiency (Note 8):    
9% Convertible Preferred Stock      
Common stock, $.001 par value; authorized 1,500,000,000 shares at April 30, 2015 and July 31, 2014, respectively; 806,477,610 and 778,512,092 issued and outstanding at April 30, 2015 and July 31, 2014, respectively 806,477us-gaap_CommonStockValue 778,512us-gaap_CommonStockValue
Additional paid-in capital 362,484,863us-gaap_AdditionalPaidInCapitalCommonStock 362,307,678us-gaap_AdditionalPaidInCapitalCommonStock
Accumulated deficit (371,806,772)us-gaap_DevelopmentStageEnterpriseDeficitAccumulatedDuringDevelopmentStage (369,948,322)us-gaap_DevelopmentStageEnterpriseDeficitAccumulatedDuringDevelopmentStage
Accumulated other comprehensive income 793,756us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax 772,074us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
Total Stockholders' Deficiency (7,721,676)us-gaap_StockholdersEquity (6,090,058)us-gaap_StockholdersEquity
TOTAL LIABILITIES AND STOCKHOLDERS' DEFICIENCY 2,813,705us-gaap_LiabilitiesAndStockholdersEquity 5,522,457us-gaap_LiabilitiesAndStockholdersEquity
Series A Convertible Preferred Stock    
Stockholders' Deficiency (Note 8):    
9% Convertible Preferred Stock      
Series B Convertible Preferred Stock    
Stockholders' Deficiency (Note 8):    
9% Convertible Preferred Stock      
Series C Convertible Preferred Stock    
Stockholders' Deficiency (Note 8):    
9% Convertible Preferred Stock      
Series D Convertible Preferred Stock    
Stockholders' Deficiency (Note 8):    
9% Convertible Preferred Stock      
Series E Convertible Preferred Stock    
Stockholders' Deficiency (Note 8):    
9% Convertible Preferred Stock      
Series F Convertible Preferred Stock    
Stockholders' Deficiency (Note 8):    
9% Convertible Preferred Stock