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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

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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: