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Common Stock, Stock Options and Warrants (Details) - USD ($)										3 Months Ended					9 Months Ended
	Jun. 11, 2025	Apr. 17, 2025	Apr. 01, 2025	Jan. 11, 2025	Jan. 07, 2025	Nov. 15, 2024	Nov. 07, 2024	Apr. 03, 2024	Oct. 10, 2023	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2025	Jun. 30, 2024	Oct. 02, 2025	Jun. 09, 2025	Sep. 30, 2024	Aug. 02, 2024	Apr. 29, 2023	Nov. 05, 2020
Common Stock, Stock Options and Warrants [Line Items]
Common stock authorized										250,000,000					250,000,000				16,000,000
Bid price per share (in Dollars per share)										$ 1					$ 1
Preferred stock par value (in Dollars per share)										$ 0.001					$ 0.001				$ 0.001
Preferred stock value issued (in Dollars)
Preferred stock shares of votes
Stock Issued During Period, Value, Issued for Services (in Dollars)												$ 109,950	$ 98,079	$ 76,146
Shares of common stock										17,623,006					17,623,006
Gross proceeds (in Dollars)			$ 1,999,873	$ 6,001,962
Net proceeds (in Dollars)			$ 1,743,757	$ 5,430,836						$ 3,294,446
Warrants issued (in Dollars)										$ 222,000					$ 222,000
Gross proceeds percentage															7.00%
Percentage of Gross Proceeds															7.00%
Own Excess Percentage				4.99%
Ownership limitation percentage										9.99%					9.99%
Other fees (in Dollars)															$ 420,168
Expenses (in Dollars)															$ 150,958
Gross proceeds (in Dollars)										$ 3,471,866
Weighted average grant date fair value of options granted (in Dollars per share)															$ 7.15
Exercisable option vested period															36 months
Stock-based compensation expense (in Dollars)										$ 3,061,763					$ 9,198,340
Deemed dividend (in Dollars)								$ 321,559
Forecast [Member]
Common Stock, Stock Options and Warrants [Line Items]
Warrants issued (in Dollars)																	$ 10,822,938
Warrants [Member]
Common Stock, Stock Options and Warrants [Line Items]
Shares of common stock								9,605
Exercise price of warrants (in Dollars per share)					$ 3.91	$ 6.25		$ 48.28		$ 5.0438					$ 5.0438
Maturity date					Jan. 08, 2030
Warrants issued (in Dollars)	$ 4,867,000				$ 2,091,000
Common shares reserved										17,623,006					17,623,006
Expire term										1 year 10 months 17 days					1 year 10 months 17 days
Pre-Funded Warrants [Member]
Common Stock, Stock Options and Warrants [Line Items]
Offering price (in Dollars per share)			$ 1.1499	$ 1.2199
Exercise price of warrants (in Dollars per share)				$ 1
Warrants purchase	4,380,000			9,840,000
Warrants exercised										1,274,131
Fair value of warrants (in Dollars)	$ 9,840,000
Placement Agent Warrants [Member]
Common Stock, Stock Options and Warrants [Line Items]
Exercise price of warrants (in Dollars per share)										$ 1.525					$ 1.525
Maturity date										Oct. 02, 2025					Oct. 02, 2025
Warrants purchase										344,400					344,400
Stock Option [Member]
Common Stock, Stock Options and Warrants [Line Items]
Contractual term for vesting period															10 years
Term of options outstanding															10 years
Unrecognized total compensation (in Dollars)										$ 2,077,242					$ 2,077,242
Board of Directors Chairman [Member] | Warrants [Member]
Common Stock, Stock Options and Warrants [Line Items]
Warrants purchase								51,780
2014 Stock Incentive Plan [Member]
Common Stock, Stock Options and Warrants [Line Items]
Common shares reserved										34,667					34,667
Options outstanding										16,910					16,910
Options shares were exercised															2,318
Options to purchase shares forfeited															15,439
2018 Omnibus Stock Incentive Plan [Member]
Common Stock, Stock Options and Warrants [Line Items]
Common shares reserved										80,000					80,000
Options outstanding										67,200					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					4,400
2020 Plan [Member]
Common Stock, Stock Options and Warrants [Line Items]
Common shares reserved										124,400					124,400
Options outstanding										66,000					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					49,600
2021 Stock Plan [Member]
Common Stock, Stock Options and Warrants [Line Items]
Common shares reserved										349,600					349,600
Options outstanding										330,000					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					1,400
2023 Stock Plan [Member]
Common Stock, Stock Options and Warrants [Line Items]
Common shares reserved										481,400					481,400
Options outstanding										359,400					359,400
Options to purchase shares forfeited															4,000
Option granted shares															118,000
Employees Stock [Member]
Common Stock, Stock Options and Warrants [Line Items]
Option granted shares							158,000
Directors Stock Plan [Member]
Common Stock, Stock Options and Warrants [Line Items]
Option granted shares							25,000
Consultant Stock Plan [Member]
Common Stock, Stock Options and Warrants [Line Items]
Option granted shares							2,000
Consultant per share (in Dollars per share)							$ 9.5
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
Term of options outstanding															10 years
Unrecognized total compensation (in Dollars)										$ 9,909,073					$ 9,909,073
Recognized over a weighted average period															1 year 4 months 28 days
Price per share (in Dollars per share)															$ 0.8
Stock-based compensation expense (in Dollars)										$ 2,719,674		2,125,237			$ 7,946,529	$ 6,022,287
Citius Oncology plan [Member] | Stock Option [Member]
Common Stock, Stock Options and Warrants [Line Items]
Recognized over a weighted average period															1 year 6 months 14 days
NoveCite plan [Member]
Common Stock, Stock Options and Warrants [Line Items]
Exercise price of warrants (in Dollars per share)										$ 0.24					$ 0.24
Common shares reserved																						2,000,000
Options outstanding										1,911,500					1,911,500
Term of options outstanding															5 years 7 months 20 days
Available for future grants										88,500					88,500
Vested option term															10 years
Stock-based compensation expense (in Dollars)										$ 1,957,000		$ 13,858			$ 5,831,000	$ 47,574
2024 Omnibus Stock Incentive Plan [Member]
Common Stock, Stock Options and Warrants [Line Items]
Common shares reserved																				15,000,000
At the Market Offering Agreement [Member]
Common Stock, Stock Options and Warrants [Line Items]
Net proceeds (in Dollars)											$ 808,640
Sold shares										2,185,249	289,910
Gross proceeds (in Dollars)											$ 839,468
Common Stock Issued for Services [Member] | Warrants [Member]
Common Stock, Stock Options and Warrants [Line Items]
Warrants issued (in Dollars)										$ 138,000					138,000
Series A Preferred Stock [Member]
Common Stock, Stock Options and Warrants [Line Items]
Sold shares of common stock		1
Preferred stock par value (in Dollars per share)		$ 0.001
Preferred stock value issued (in Dollars)																		$ 100
Preferred stock shares of votes		1,000,000,000
Series A Preferred Stock [Member] | Mr. Mazur [Member]
Common Stock, Stock Options and Warrants [Line Items]
Preferred stock value issued (in Dollars)		$ 100
Common Stock [Member]
Common Stock, Stock Options and Warrants [Line Items]
Sold shares of common stock	540,000		465,000
Common stock shares issued									4,351
Offering price (in Dollars per share)	$ 1.22		$ 1.15
Fair value of warrants (in Dollars)															100,000
Common Stock [Member] | Warrants [Member]
Common Stock, Stock Options and Warrants [Line Items]
Warrants issued (in Dollars)										$ 104,000					$ 104,000
Common Stock [Member] | Pre-Funded Warrants [Member]
Common Stock, Stock Options and Warrants [Line Items]
Exercise price of warrants (in Dollars per share)			$ 0.0001	$ 0.0001
Warrants exercised										1,250,000
Common Stock [Member] | Placement Agent Warrants [Member]
Common Stock, Stock Options and Warrants [Line Items]
Exercise price of warrants (in Dollars per share)										$ 1.4375					$ 1.4375
Warrants purchase										121,739					121,739
Common Stock [Member] | Board of Directors Chairman [Member]
Common Stock, Stock Options and Warrants [Line Items]
Exercise price of warrants (in Dollars per share)								$ 35.5
Common Stock [Member] | Investor [Member]
Common Stock, Stock Options and Warrants [Line Items]
Stock Issued During Period, Value, Issued for Services (in Dollars)									$ 76,146
Common Stock Offerings [Member]
Common Stock, Stock Options and Warrants [Line Items]
Sold shares of common stock					743,496	480,000
Shares of common stock										33,600					33,600
Gross proceeds (in Dollars)					$ 3,000,000	$ 3,000,000
Net proceeds (in Dollars)					$ 2,657,167	$ 2,574,051
Offering price (in Dollars per share)					$ 4.035	$ 6.25
Exercise price of warrants (in Dollars per share)										$ 7.8125					$ 7.8125
Maturity date										Jan. 07, 2030					Jan. 07, 2030
Warrants purchase					743,496
Purchase shares common stock															52,045
Common Stock Offerings [Member] | Warrants [Member]
Common Stock, Stock Options and Warrants [Line Items]
Maturity date										Nov. 15, 2029					Nov. 15, 2029
Common Stock Offerings [Member] | Pre-Funded Warrants [Member]
Common Stock, Stock Options and Warrants [Line Items]
Warrants purchase			1,274,131
Common Stock Offerings [Member] | Investor [Member]
Common Stock, Stock Options and Warrants [Line Items]
Shares of common stock						480,000
Maturity date						Nov. 19, 2029
Warrants issued (in Dollars)						$ 1,575,000
Maximum [Member]
Common Stock, Stock Options and Warrants [Line Items]
Common stock authorized										400,000,000					400,000,000
Term of options outstanding															36 months
Maximum [Member] | Citius Oncology plan [Member]
Common Stock, Stock Options and Warrants [Line Items]
Vesting period															36 months
Maximum [Member] | Series A Preferred Stock [Member]
Common Stock, Stock Options and Warrants [Line Items]
Common stock authorized		250,000,000
Minimum [Member]
Common Stock, Stock Options and Warrants [Line Items]
Common stock authorized										16,000,000					16,000,000
Term of options outstanding															12 months
Minimum [Member] | Citius Oncology plan [Member]
Common Stock, Stock Options and Warrants [Line Items]
Vesting period															12 months
Minimum [Member] | Series A Preferred Stock [Member]
Common Stock, Stock Options and Warrants [Line Items]
Common stock authorized		16,000,000

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