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PROMISSORY NOTES PAYABLE (Detail Textuals) (USD $)
6 Months Ended 0 Months Ended
Mar. 31, 2015
Nov. 11, 2014
Nov. 20, 2014
Sep. 30, 2014
Sep. 11, 2014
Short-term Debt [Line Items]          
Promissory note issued to related party (in dollars)       $ 1,000,000us-gaap_DebtInstrumentFaceAmount  
Promissory notes maturity term 10 months        
Debt instrument, convertible, threshold consecutive trading days 5 days        
Conversion price of convertible promissory note converted (in dollars per share)     $ 3.25us-gaap_DebtInstrumentConvertibleConversionPrice1    
Conversion price of convertible promissory note converted into common stock (in dollars per share)     $ 3.24apdn_DebtInstrumentConvertibleForOneShareOfCommonStockConversionPrice    
Conversion price of convertible promissory note converted into warrant (in dollars per share)     $ 0.01apdn_DebtInstrumentConvertibleForOneShareOfWarrantConversionPrice    
Loss on conversion of promissory notes 980,842apdn_LossOnConversionOfPromissoryNotes        
Promissory notes          
Short-term Debt [Line Items]          
Promissory note issued to related party (in dollars)         1,800,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
Interest rate on promissory note         12.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
Loss on conversion of promissory notes 981,000apdn_LossOnConversionOfPromissoryNotes
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
       
Interest expense 31,875us-gaap_InterestExpenseDebt
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
       
Promissory notes | James A. Hayward          
Short-term Debt [Line Items]          
Promissory note issued to related party (in dollars)         1,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= apdn_PresidentChairmanAndChiefExecutiveOfficerMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
Interest rate on promissory note         12.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= apdn_PresidentChairmanAndChiefExecutiveOfficerMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
Common stock issued in settlement of convertible debentures and interest   315,171us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= apdn_PresidentChairmanAndChiefExecutiveOfficerMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
     
Number of shares issued in settlement of convertible notes and accrued interest   315,171apdn_NumberOfSharesIssuedInSettlementOfConvertibleNotesAndAccruedInterest
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= apdn_PresidentChairmanAndChiefExecutiveOfficerMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
     
Conversion price of convertible promissory note converted (in dollars per share)   $ 3.25us-gaap_DebtInstrumentConvertibleConversionPrice1
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= apdn_PresidentChairmanAndChiefExecutiveOfficerMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
     
Promissory notes | Another individual          
Short-term Debt [Line Items]          
Promissory note issued to related party (in dollars)         $ 800,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= apdn_AnotherIndividualMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
Common stock issued in settlement of convertible debentures and interest   252,137us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= apdn_AnotherIndividualMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
     
Number of shares issued in settlement of convertible notes and accrued interest   252,137apdn_NumberOfSharesIssuedInSettlementOfConvertibleNotesAndAccruedInterest
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= apdn_AnotherIndividualMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
     
Conversion price of convertible promissory note converted (in dollars per share)   $ 3.25us-gaap_DebtInstrumentConvertibleConversionPrice1
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= apdn_AnotherIndividualMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember