Percentage of beneficial ownership limitation

No definition available.

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- Definition

Percentage of beneficial ownership limitation at the option of the holder.

+ References

No definition available.

+ Details

Name:	apdn_BeneficialOwnershipLimitationPercentageAtOptionOfHolder
Namespace Prefix:	apdn_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- 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

- Definition

Represents the amount of deemed dividends related to warrant modifications.

+ References

No definition available.

+ Details

Name:	apdn_DeemedDividendRelatedToWarrantModifications
Namespace Prefix:	apdn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount related to gross proceeds of offering after deducting underwriter discounts and commissions and other offering expenses.

+ References

No definition available.

+ Details

Name:	apdn_NetProceedsOfOfferingAfterUnderwriterDiscountsCommissionsAndOtherOfferingExpenses
Namespace Prefix:	apdn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Number of remaining warrants.

+ References

No definition available.

+ Details

Name:	apdn_NumberOfRemainingWarrantsIssued
Namespace Prefix:	apdn_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Period of prior notice to increase beneficial ownership percentage limitation

+ References

No definition available.

+ Details

Name:	apdn_PeriodOfPriorNoticeToIncreaseBeneficialOwnershipPercentageLimitation
Namespace Prefix:	apdn_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Transaction cost allocated to warrant liabilities.

+ References

No definition available.

+ Details

Name:	apdn_TransactionCostAllocatedToWarrantLiabilities
Namespace Prefix:	apdn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of Warrants fair value at the time of issuance.

+ References

No definition available.

+ Details

Name:	apdn_WarrantFairValueAtTimeOfIssuance
Namespace Prefix:	apdn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Exercisable period of warrants from the date of issuance.

+ References

No definition available.

+ Details

Name:	apdn_WarrantsExercisablePeriod
Namespace Prefix:	apdn_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- 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=123467817&loc=d3e21475-112644

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

+ Details

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

- 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

- Definition

Face amount or stated value per share of common stock.

+ References

+ Details

Name:	us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

+ References

+ Details

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

- Definition

Amount of expense (income) related to adjustment to fair value of warrant liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 480
-SubTopic 10
-Section 25
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=109262497&loc=d3e20148-110875

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3255-108585

+ Details

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Namespace Prefix:	us-gaap_
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=123570139&loc=d3e3255-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

+ References

No definition available.

+ Details

Name:	us-gaap_SaleOfStockPricePerShare
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

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

- Definition

Number of new stock issued during the period.

+ 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
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
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=123874694&loc=d3e19207-110258

+ Details

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

- Definition

Fair value portion of warrants not settleable in cash classified as equity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

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Period Type:	instant

- Details

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- Details

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- Details

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- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=apdn_CommonWarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
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- Details

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- Details

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CAPITAL STOCK (Details) - USD ($)		3 Months Ended		6 Months Ended
CAPITAL STOCK (Details) - USD ($)	Feb. 24, 2022	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021	Sep. 30, 2021
Share-Based Compensation Arrangement By Share-Based Payment Award [Line Items]
Exercise price of warrants (in dollars per share)		$ 2.80		$ 2.80
Beneficial ownership limitation percentage				4.99%
Beneficial ownership limitation percentage at the option of the holder				9.99%
Period of prior notice to increase beneficial ownership percentage limitation				61 days
Gain in the change in fair value of Warrants		$ (782,500)	$ 0	$ (782,500)	$ 0
Deemed dividend related to warrant modifications		$ 110,105	0	$ 110,105	0
Common stock, par value		$ 0.001		$ 0.001		$ 0.001
Common stock, shares authorized		200,000,000		200,000,000		200,000,000
Number of warrants outstanding		2,988,163		2,988,163		745,268
Number of warrants exercised				0
Net proceeds from exercise of warrants				$ 0	2,613,929
Transaction Cost Allocated To Warrant Liabilities		$ (391,335)	$ 0	$ (391,335)	$ 0
Warrants issued in November 2019
Share-Based Compensation Arrangement By Share-Based Payment Award [Line Items]
Number of remaining warrants issued		458,813		458,813
Warrants issued in October 2020
Share-Based Compensation Arrangement By Share-Based Payment Award [Line Items]
Number of remaining warrants issued		159,000		159,000
Warrants issued in December 2020
Share-Based Compensation Arrangement By Share-Based Payment Award [Line Items]
Number of remaining warrants issued		100,000		100,000
Common warrants.
Share-Based Compensation Arrangement By Share-Based Payment Award [Line Items]
Warrants fair value		$ 2,567,900		$ 2,567,900
Gain in the change in fair value of Warrants		782,500		782,500
Offering \| Common warrants.
Share-Based Compensation Arrangement By Share-Based Payment Award [Line Items]
Warrants Exercise period	6 months
Warrants Expiration period	5 years
Gross proceeds	$ 4,200,000
Net proceeds				3,700,000
Warrants fair value at the time of issuance		$ 3,350,400		$ 3,350,400
Offering \| Instittional investors
Share-Based Compensation Arrangement By Share-Based Payment Award [Line Items]
Common stock issued and sold	748,200
Offering price	$ 2.80
Offering \| Instittional investors \| Prefunded warrants
Share-Based Compensation Arrangement By Share-Based Payment Award [Line Items]
Common stock issued and sold	748,200
Exercise price of warrants (in dollars per share)	$ 0.0001
Offering price	2.7999
Offering \| Instittional investors \| Common warrants.
Share-Based Compensation Arrangement By Share-Based Payment Award [Line Items]
Exercise price of warrants (in dollars per share)	$ 2.84
Number of common stock called by warrants	1,496,400