CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Revenues
Total revenues	$ 929,631	$ 4,407,614	$ 1,820,795	$ 9,670,366
Total cost of revenues	633,980	2,600,179	1,294,047	5,485,248
Gross profit	295,651	1,807,435	526,748	4,185,118
Operating expenses:
Selling, general and administrative	3,000,208	3,522,715	6,084,557	6,148,072
Research and development	913,194	988,744	1,849,009	1,960,048
Total operating expenses	3,913,402	4,511,459	7,933,566	8,108,120
LOSS FROM OPERATIONS	(3,617,751)	(2,704,024)	(7,406,818)	(3,923,002)
Interest income	15,352	3,639	48,676	7,325
Unrealized gain on change in fair value of warrants classified as a liability	1,765,000	3,250,900	4,404,000	613,100
Unrealized (loss) on change in fair value of warrants classified as a liability - warrant modification	(394,000)		(394,000)
Loss on issuance of warrants	(1,633,767)		(1,633,767)
Transaction cost allocated to warrant liabilities	(633,198)		(633,198)
Other income (expense), net	4,581	661	(8,957)	9,507
(Loss) income before provision for income taxes	(4,493,783)	551,176	(5,624,064)	(3,293,070)
NET (LOSS) INCOME	(4,493,783)	551,176	(5,624,064)	(3,293,070)
Less: Net loss attributable to noncontrolling interest	23,309	37,167	48,490	38,041
NET (LOSS) INCOME attributable to Applied DNA Sciences, Inc.	(4,470,474)	588,343	(5,575,574)	(3,255,029)
Deemed dividend related to warrant modifications	(155,330)		(233,087)
NET (LOSS) INCOME attributable to common stockholders	$ (4,625,804)	$ 588,343	$ (5,808,661)	$ (3,255,029)
Net (loss) income per share attributable to common stockholders - basic (in dollars per share)	$ (5.31)	$ 0.91	$ (7.47)	$ (5.04)
Net (loss) income per share attributable to common stockholders - diluted (in dollars per share)	$ (5.31)	$ 0.91	$ (7.47)	$ (5.04)
Weighted average shares outstanding - basic (in shares)	871,319	645,426	777,495	645,426
Weighted average shares outstanding - diluted (in shares)	871,319	645,426	777,495	645,426
Product revenues
Revenues
Total revenues	$ 393,125	$ 297,454	$ 700,442	$ 813,850
Total cost of revenues	340,301	369,563	622,846	734,941
Service revenues
Revenues
Total revenues	205,486	169,058	452,633	401,119
Clinical laboratory service revenues
Revenues
Total revenues	331,020	3,941,102	667,720	8,455,397
Total cost of revenues	$ 293,679	$ 2,230,616	$ 671,201	$ 4,750,307