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STOCK OPTIONS AND WARRANTS - Transactions involving warrants (Details) | 12 Months Ended
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Sep. 30, 2018 $ / shares shares
Number of Shares |
Balance at October 1, 2017 | shares | 9,540,455
Granted | shares | 2,735,000
Exercised | shares | 0
Cancelled or expired | shares | (66,928)
Balance, September 30, 2018 | shares | 12,208,527
Weighted Average Exercise Price Per Share |
Balance at October 1, 2017 | $ / shares | $ 3.6
Granted | $ / shares | 2
Exercised | $ / shares | 0
Cancelled or expired | $ / shares | (2.88)
Balance, September 30, 2018 | $ / shares | $ 3.24

X
- Definition This element represents the number of warrants exercised by participants. + References No definition available. + Details
Name: | apdn_ClassOfWarrantOrRightExercised
Namespace Prefix: | apdn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition This element represents the number of warrants that were either cancelled or expired. + References No definition available. + Details
Name: | apdn_ClassOfWarrantOrRightForfeituresAndExpirations
Namespace Prefix: | apdn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition This element represents number of warrants granted to participants. + References No definition available. + Details
Name: | apdn_ClassOfWarrantOrRightGranted
Namespace Prefix: | apdn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | apdn_ClassOfWarrantOrRightNumberOfSharesRollForward
Namespace Prefix: | apdn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | apdn_ClassOfWarrantOrRightWeightedAveragePricePerShareRollForward
Namespace Prefix: | apdn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents weighted average exercise price per share or per unit of warrants or rights Cancelled or expired. + References No definition available. + Details
Name: | apdn_WeightedAveragePricePerShareWarrantCancelledOrExpired
Namespace Prefix: | apdn_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents weighted average exercise price per share or per unit of warrants or rights exercised. + References No definition available. + Details
Name: | apdn_WeightedAveragePricePerShareWarrantExercised
Namespace Prefix: | apdn_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents weighted average exercise price per share or per unit of warrants or rights granted. + References No definition available. + Details
Name: | apdn_WeightedAveragePricePerShareWarrantGranted
Namespace Prefix: | apdn_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents weighted average exercise price per share or per unit of warrants or rights outstanding. + References No definition available. + Details
Name: | apdn_WeightedAveragePricePerShareWarrantOutstanding
Namespace Prefix: | apdn_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of warrants or rights outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant