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Common Stock, Stock Options and Warrants (Details) - USD ($)							12 Months Ended
	Sep. 25, 2024	Apr. 30, 2024	Apr. 25, 2024	Jan. 17, 2024	Oct. 10, 2023	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2021	Aug. 07, 2024	Apr. 02, 2024	Apr. 29, 2023
Common Stock, Stock Options and Warrants [Line Items]
Fair value of common stock issued (in Dollars)							$ 284,176	$ 102,000
Direct offering common shares		857,143
Shares of common stock							2,945,337
Purchase price (in Dollars per share)		$ 17.5
Proceeds from issuance of warrants (in Dollars)		$ 15,000,002
Exercise price of warrants (in Dollars per share)							$ 6.25
Agent fee (in Dollars)							$ 84,735
Options outstanding						532,207	656,084	532,207
Options shares were exercised							2,125
Options to purchase shares forfeited							40,398
Option granted shares							166,400
Weighted average grant date fair value vested per share (in Dollars per share)							$ 13.38	$ 24.44
Term of options outstanding						7 years 4 months 28 days	7 years 3 months 3 days
Weighted average exercise price per share (in Dollars per share)							$ 17.5
Shares exercisable							347,618
Exercisable option vested period							36 months
Vested option term							6 years 3 months 7 days
Stock-based compensation expense (in Dollars)							$ 11,839,678	$ 6,616,705
Dividends (in Dollars)	$ 350,241
Expire term							5 years
Common Stock Offerings [Member]
Common Stock, Stock Options and Warrants [Line Items]
Shares of common stock		857,143
Exercise price of warrants (in Dollars per share)		$ 18.75
Warrants [Member]
Common Stock, Stock Options and Warrants [Line Items]
Shares of common stock	111,732									156,863	9,605
Exercise price of warrants (in Dollars per share)											$ 48.28
Dividends (in Dollars)							$ 375,511
Expire term	2 years 10 months 17 days
August 2018 Offering Agent [Member]
Common Stock, Stock Options and Warrants [Line Items]
Shares of common stock							7,576
Exercise price of warrants (in Dollars per share)							$ 39.84
Maturity date							Aug. 08, 2024
September 2019 Offering Underwriter [Member]
Common Stock, Stock Options and Warrants [Line Items]
Shares of common stock							7,774
Exercise price of warrants (in Dollars per share)							$ 27.97
Maturity date							Sep. 27, 2024
Stock Option Plans [Member]
Common Stock, Stock Options and Warrants [Line Items]
Term of options outstanding							10 years	10 years
Unrecognized total compensation (in Dollars)							$ 2,678,274
Minimum [Member]
Common Stock, Stock Options and Warrants [Line Items]
Term of options outstanding							12 months	12 months
Maximum [Member]
Common Stock, Stock Options and Warrants [Line Items]
Term of options outstanding							36 months	36 months
2014 Stock Incentive Plan [Member]
Common Stock, Stock Options and Warrants [Line Items]
Common shares reserved							34,667
Options outstanding							18,484
Options shares were exercised							2,318
Options to purchase shares forfeited							13,865
2018 Omnibus Stock Incentive Plan [Member]
Common Stock, Stock Options and Warrants [Line Items]
Common shares reserved							80,000
Options outstanding							67,200
Options shares were exercised							4,667
Options to purchase shares forfeited							3,733
2020 Omnibus Stock Incentive Plan [Member]
Common Stock, Stock Options and Warrants [Line Items]
Options outstanding							4,400
2020 Plan [Member]
Common Stock, Stock Options and Warrants [Line Items]
Common shares reserved							124,400
Options outstanding							66,000
Options to purchase shares forfeited							8,800
2021 Omnibus Stock Incentive Plan [Member]
Common Stock, Stock Options and Warrants [Line Items]
Options outstanding							49,600
2021 Stock Plan [Member]
Common Stock, Stock Options and Warrants [Line Items]
Common shares reserved							349,600
Options outstanding							330,000
Options to purchase shares forfeited							18,200
2023 Omnibus Stock Incentive Plan [Member]
Common Stock, Stock Options and Warrants [Line Items]
Options outstanding							1,400
2023 Stock Plan [Member]
Common Stock, Stock Options and Warrants [Line Items]
Common shares reserved							481,400
Options outstanding							174,400
Options to purchase shares forfeited							4,000
Option granted shares							303,000
Citius Oncology plan [Member]
Common Stock, Stock Options and Warrants [Line Items]
Common shares reserved												15,000,000
Contractual term for vesting period							10 years
Unrecognized total compensation (in Dollars)							$ 11,592,383
Recognized over a weighted average period							1 year 9 months 7 days
Price per share (in Dollars per share)							$ 1.66
Stock-based compensation expense (in Dollars)								$ 1,965,500
Citius Oncology plan [Member] | Stock Option Plans [Member]
Common Stock, Stock Options and Warrants [Line Items]
Recognized over a weighted average period							1 year 5 months 8 days
Citius Oncology plan [Member] | Minimum [Member]
Common Stock, Stock Options and Warrants [Line Items]
Vesting period							12 months
Citius Oncology plan [Member] | Maximum [Member]
Common Stock, Stock Options and Warrants [Line Items]
Vesting period							36 months
NoveCite plan [Member]
Common Stock, Stock Options and Warrants [Line Items]
Common shares reserved							2,000,000
Options outstanding							1,911,500
Term of options outstanding							6 years 4 months 20 days
Available for future grants							88,500
Vested option term							10 years
Stock-based compensation expense (in Dollars)							$ 47,574	$ 130,382
Board of Directors [Member]
Common Stock, Stock Options and Warrants [Line Items]
Options to purchase shares forfeited									88,500
Option granted shares									2,000,000
Contractual term for vesting period							10 years
Weighted average exercise price per share (in Dollars per share)									$ 0.24
Shares exercisable							1,911,500
Common Stock [Member]
Common Stock, Stock Options and Warrants [Line Items]
Common stock shares issued			6,000	5,128	4,351
Shares of common stock											51,780
Exercise price of warrants (in Dollars per share)	$ 19.25									$ 28.75	$ 35.5
Common Stock [Member] | Warrants [Member]
Common Stock, Stock Options and Warrants [Line Items]
Dividends (in Dollars)							$ 321,559
Common Stock [Member] | August 2018 Offering Agent [Member]
Common Stock, Stock Options and Warrants [Line Items]
Shares of common stock										7,576
Exercise price of warrants (in Dollars per share)										$ 39.84
Common Stock [Member] | September 2019 Offering Underwriter [Member]
Common Stock, Stock Options and Warrants [Line Items]
Shares of common stock	7,774
Exercise price of warrants (in Dollars per share)	$ 27.97
Common Stock [Member] | Citius Oncology plan [Member]
Common Stock, Stock Options and Warrants [Line Items]
Stock-based compensation expense (in Dollars)							7,498,817
Common Stock [Member] | Investor [Member]
Common Stock, Stock Options and Warrants [Line Items]
Fair value of common stock issued (in Dollars)			$ 109,950	$ 98,079	$ 76,146
Common Stock Offerings [Member]
Common Stock, Stock Options and Warrants [Line Items]
Exercise price of warrants (in Dollars per share)		$ 21.875
Maturity date		Apr. 25, 2029
Warrants issued (in Dollars)		$ 756,000
Net proceeds (in Dollars)		13,718,951					$ 162,000
Agent fee (in Dollars)		1,050,000
Placement agent expenses (in Dollars)		135,000
Legal fee (in Dollars)		80,101
Other offering expenses (in Dollars)		$ 15,950
Warrants to purchase common shares		60,000
Common Stock Offerings [Member] | Investor [Member]
Common Stock, Stock Options and Warrants [Line Items]
Maturity date		Oct. 30, 2029
Warrants issued (in Dollars)		$ 11,206,000

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