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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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