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Common Stock, Stock Options and Warrants (Tables)
 3 Months Ended
Dec. 31, 2023
Common Stock, Stock Options and Warrants [Abstract]  
Schedule of Option Activity Under the Stock Option Plans A summary of option activity under our stock option plans (excluding the NoveCite and Citius Oncology Stock Plans) is presented below:
   Option
Shares		   Weighted-
Average
Exercise
Price		   Weighted-
Average
Remaining
Contractual
Term		  Aggregate
Intrinsic
Value		 
Outstanding at September 30, 2023   13,305,171   $           1.79   7.41 years  $56,203 
Granted   4,085,000    0.70         
Exercised   
—
    
—
         
Forfeited or expired   
—
    
—
         
Outstanding at December 31, 2023   17,390,171   $1.54   7.78 years  $379,421 
                   
Exercisable at December 31, 2023   9,231,839   $1.91   6.60 years  $134,921 
Schedule of Warrants Outstanding As of December 31, 2023, we have reserved shares of common stock for the exercise of outstanding warrants as follows:
   Exercise
price		   Number   Expiration Date
August 2018 Offering Investors  $1.15    3,921,569   August 14, 2024
August 2018 Offering Agent   1.59    189,412   August 8, 2024
April 2019 Registered Direct/Private Placement Investors   1.42    1,294,498   April 5, 2024
April 2019 Registered Direct/Private Placement Agent   1.93    240,130   April 5, 2024
September 2019 Offering Investors   0.77    2,793,297   September 27, 2024
September 2019 Offering Underwriter   1.12    194,358   September 27, 2024
February 2020 Exercise Agreement Agent   1.28    138,886   August 19, 2025
May 2020 Registered Direct Offering Investors   1.00    1,670,588   November 18, 2025
May 2020 Registered Direct Offering Agent   1.33    155,647   May 14, 2025
August 2020 Underwriter   1.31    201,967   August 10, 2025
January 2021 Private Placement Investors   1.23    3,091,192   July 27, 2026
January 2021 Private Placement Agent   1.62    351,623   July 27, 2026
February 2021 Offering Investors   1.70    20,580,283   February 19, 2026
February 2021 Offering Agent   1.88    2,506,396   February 19, 2026
May 2023 Registered Direct Offering Investors   1.50    12,500,001   May 8, 2028
May 2023 Registered Direct Offering Agent   1.50    875,000   May 3, 2028
         50,704,847    

 
Schedule of Common Stock Reserved for Future Issuances A summary of common stock reserved for future issuances as of December 31, 2023 is as follows:
Stock plan options outstanding   17,390,171 
Stock plan shares available for future grants   7,650,000 
Warrants outstanding   50,704,847 
Total   75,745,018