Represents Agreement Renewal Period.

No definition available.

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

- Definition

Annual bonus approved if company reaches threshold revenues.

+ References

No definition available.

+ Details

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

- 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:	apdn_CommitmentsAndContingenciesLineItems
Namespace Prefix:	apdn_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of one-time discretionary bonus that is payable to officer.

+ References

No definition available.

+ Details

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

- Definition

Represents Revenue Bonus recorded to long term accrued liabilities on the balance sheet.

+ References

No definition available.

+ Details

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

- Definition

Represents special cash bonus.

+ References

No definition available.

+ Details

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

- Definition

Represents special cash incentive bonus payable on completing threshold annual revenue.

+ References

No definition available.

+ Details

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

- Definition

Represents special cash incentive bonus payable on completing threshold annual revenue in excess of first threshold.

+ References

No definition available.

+ Details

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

- Definition

Represents threshold annual revenue.

+ References

No definition available.

+ Details

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

- Definition

Represents threshold annual revenue in excess of first threshold.

+ References

No definition available.

+ Details

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

- Definition

Represents of threshold revenue for fiscal year.

+ References

No definition available.

+ Details

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

- Definition

Represents threshold revenue for repayment of annual salary.

+ References

No definition available.

+ Details

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

- Definition

Amount of expense for salary and wage arising from service rendered by officer. Excludes allocated cost, labor-related nonsalary expense, and direct and overhead labor cost included in cost of good and service sold.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(4))
-URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227

+ Details

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

- Details

Name:	apdn_AgreementAxis=apdn_EmploymentAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_TitleOfIndividualAxis=srt_ChiefExecutiveOfficerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	apdn_AgreementAxis=apdn_NewEmploymentAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

COMMITMENTS AND CONTINGENCIES - Employment Agreement (Details) - USD ($)	Oct. 03, 2020	Dec. 05, 2019	Dec. 27, 2018	May 15, 2018	May 02, 2018	Jul. 28, 2017	Oct. 31, 2020	Oct. 19, 2020
COMMITMENTS AND CONTINGENCIES
Revenue bonus recorded to long term accrued liabilities							$ 816,840
Employment Agreement [Member] \| CEO
COMMITMENTS AND CONTINGENCIES
Annual base salary	$ 400,000
One-time discretionary bonus awarded								$ 250,000
Approved bonus		$ 753,623	$ 553,623	$ 121,125	$ 403,623
Threshold revenue for two consecutive quarters				3,000,000
Threshold revenue for fiscal year				$ 12,000,000
New Employment Agreement \| CEO
COMMITMENTS AND CONTINGENCIES
Agreement renewal period						1 year
Special cash incentive bonus						$ 800,000
Special cash incentive bonus payable on completing threshold annual revenue						300,000
Threshold annual revenue						8,000,000
Special cash incentive bonus payable on completing threshold annual revenue in excess of first threshold						100,000
Threshold annual revenue in excess of first threshold						2,000,000
Annual base salary						$ 400,000