CONSOLIDATED STATEMENT OF CASH FLOWS (Parentheticals)	6 Months Ended
Mar. 31, 2019 USD ($)
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Interest paid in kind, related party	$ 35,550

Interest paid to related party other than in cash for example by issuing additional debt securities. As a noncash item, it is added to net income when calculating cash provided by or used in operations using the indirect method.

No definition available.

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