The shares represents aggregate exercised of warrants.

No definition available.

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- Definition

This element represents the number of warrants exercised by participants.

+ References

No definition available.

+ Details

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- Definition

Amount of penalties for prepayment of debt instrument.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

This information is pertaining to the share of investors exercised warrants.

+ References

No definition available.

+ Details

Name:	apdn_InvestorsExercisedWarrants
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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Minimum percentage of the Company's common stock held by the shareholder.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
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- Definition

Number of warrants agreed to be issued by the company.

+ References

No definition available.

+ Details

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Namespace Prefix:	apdn_
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- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644

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Period Type:	instant

- Definition

Number of warrants or rights outstanding.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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Data Type:	num:percentItemType
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Period Type:	instant

- Definition

The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow associated with the amount received from holders exercising their stock warrants.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash outflow for a borrowing supported by a written promise to pay an obligation.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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- Details

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SUBSEQUENT EVENTS (Details) - USD ($)								12 Months Ended
SUBSEQUENT EVENTS (Details) - USD ($)	Dec. 11, 2020	Dec. 10, 2020	Dec. 09, 2020	Oct. 09, 2020	Oct. 07, 2020	Oct. 01, 2020	May 01, 2020	Sep. 30, 2020	Sep. 30, 2019	Dec. 21, 2019	Nov. 15, 2019	Aug. 07, 2019	Dec. 31, 2018
Subsequent Event [Line Items]
Number of warrants exercised								1,649,786
Exercise Price										$ 17.60	$ 5.60	$ 20.00
Proceeds from exercise of warrants								$ 8,055,797	$ 987,501
Number of warrants outstanding								1,038,919	263,592			143,252
Offering
Subsequent Event [Line Items]
Number of warrants exercised								1,649,786
Exercise Price								$ 12.00			$ 5.25		$ 5.60
Proceeds from exercise of warrants								$ 8,100,000
Number of warrants outstanding													8,375
Subsequent event
Subsequent Event [Line Items]
Proceeds from exercise of warrants		$ 1,100,000
Investors exercised warrants		100,000	100,000
Aggregate exercised of warrants		200,000
Subsequent event \| Dillon Hill Capital, LLC
Subsequent Event [Line Items]
Minimum percentage of shareholding in the Company's common stock				5.00%
Subsequent event \| Dillon Hill Capital, LLC \| Secured Convertible Notes ("2018 Notes")
Subsequent Event [Line Items]
Payoff Amount				$ 1,665,581
Subsequent event \| Replacement Warrants
Subsequent Event [Line Items]
Exercise Price					$ 7.54
Number of warrants agreed to be issued	100,000				159,000
Term of the warrants					5 years
Subsequent event \| Replacement warrants of $6.57 exercise price
Subsequent Event [Line Items]
Exercise Price	$ 6.57
Number of warrants agreed to be issued	50,000
Subsequent event \| Replacement warrants of $6.46 exercise price
Subsequent Event [Line Items]
Exercise Price	$ 6.46
Number of warrants agreed to be issued	50,000
Subsequent event \| Offering
Subsequent Event [Line Items]
Number of warrants exercised					318,000	518,551
Exercise Price					$ 5.25
Proceeds from exercise of warrants					$ 1,669,500	$ 2,600,000
Number of warrants outstanding					661,000
PPP Loan
Subsequent Event [Line Items]
Loan amount received							$ 847,000
Interest rate (as a percent)							1.00%
Prepayment penalties							$ 0