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WARRANTS - Additional Information (Details) - shares | Jun. 30, 2024 | Sep. 30, 2023
--- | --- | ---
Warrants outstanding |  |
Number of warrants outstanding | 19,748,143 | 261,030
May 2024 Series Warrants |  |
Warrants outstanding |  |
Number of warrants outstanding | 18,461,538 |

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ClassOfWarrantOrRightLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=apdn_May2024SeriesWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |