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STOCK OPTIONS AND WARRANTS (Details) | 12 Months Ended
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Sep. 30, 2021 $ / shares shares
Number of Shares |
Balance at October 1, 2020 | shares | 1,038,919
Granted | shares | 259,000
Exercised | shares | (520,151)
Cancelled or expired | shares | (32,500)
Balance, September 30, 2021 | shares | 745,268
Weighted Average Exercise Price Per Share |
Balance at October 1, 2020 | $ / shares | $ 10.83
Granted | $ / shares | 7.14
Exercised | $ / shares | 5.25
Cancelled or expired | $ / shares | 171.56
Balance, September 30, 2021 | $ / shares | $ 6.44

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

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

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

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

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

X
- Definition Number of warrants or rights outstanding. + References No definition available. + Details
Name: | us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant