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Common Stock, Stock Options and Warrants - Schedule of Option Activity Under Our Stock Option Plans (Details) - Stock Option Plans [Member] - USD ($)
 6 Months Ended
Sep. 30, 2024
Mar. 31, 2025
Schedule of Option Activity Under Our Stock Option Plans [Line Items]    
Option Shares, Outstanding Ending balance 656,084 841,084
Weighted- Average Exercise Price, Outstanding Ending balance (in Dollars per share) $ 36.41 $ 30.49
Weighted- Average Remaining Contractual Term Outstanding Ending balance 7 years 3 months 3 days 7 years 4 months 20 days
Aggregate Intrinsic Value, Outstanding Ending balance (in Dollars) $ 0 $ 0
Shares, Outstanding Exercisable   511,018
Weighted- Average Exercise Price, Exercisable (in Dollars per share)   $ 40.41
Weighted- Average Remaining Contractual Term, Exercisable   6 years 4 months 9 days
Aggregate Intrinsic Value, Exercisable (in Dollars)   $ 0
Option Shares, Granted   185,000
Weighted- Average Exercise Price, Granted (in Dollars per share)   $ 9.5
Option Shares, Exercised  
Weighted- Average Exercise Price, Exercised (in Dollars per share)  
Option Shares, Forfeited or expired  
Weighted- Average Exercise Price, Forfeited or expired (in Dollars per share)  
Citius Oncology [Member]    
Schedule of Option Activity Under Our Stock Option Plans [Line Items]    
Option Shares, Outstanding Ending balance 12,750,000 18,500,000
Weighted- Average Exercise Price, Outstanding Ending balance (in Dollars per share) $ 2.15 $ 1.81
Weighted- Average Remaining Contractual Term Outstanding Ending balance 8 years 9 months 10 days 8 years 8 months 19 days
Aggregate Intrinsic Value, Outstanding Ending balance (in Dollars) $ 0
Shares, Outstanding Exercisable   5,135,417
Weighted- Average Exercise Price, Exercisable (in Dollars per share)   $ 2.06
Weighted- Average Remaining Contractual Term, Exercisable   8 years 4 months 20 days
Aggregate Intrinsic Value, Exercisable (in Dollars)  
Option Shares, Granted   5,750,000
Weighted- Average Exercise Price, Granted (in Dollars per share)   $ 1.07
Option Shares, Forfeited or expired