v3.26.1
Stockholders’ Equity - Schedule of Option Activity Under Our Stock Option Plans (Details) - Stock Option [Member]
 9 Months Ended
Sep. 30, 2025
USD ($)
$ / shares
shares
Jun. 30, 2026
USD ($)
$ / shares
shares
Schedule of Option Activity Under Our Stock Option Plans [Line Items]    
Option Shares, Outstanding balance | shares 839,510  
Weighted- Average Exercise Price, Outstanding balance | $ / shares $ 30.09  
Weighted- Average Remaining Contractual Term, Outstanding balance 6 years 10 months 24 days 6 years 1 month 2 days
Aggregate Intrinsic Value, Outstanding balance | $ $ 0  
Option Shares, Granted | shares  
Weighted- Average Exercise Price, Granted | $ / shares  
Option Shares, Exercised | shares  
Weighted- Average Exercise Price, Exercised | $ / shares  
Option Shares, Forfeited or expired | shares   (3,200)
Weighted- Average Exercise Price, Forfeited or expired | $ / shares   $ 234.98
Option Shares, Outstanding balance | shares   836,310
Weighted- Average Exercise Price, Outstanding balance | $ / shares   $ 29.31
Aggregate Intrinsic Value, Outstanding balance | $   $ 0
Option Shares, Exercisable Ending Balance | shares   685,643
Weighted- Average Exercise Price, Exercisable Ending Balance | $ / shares   $ 33.07
Weighted- Average Remaining Contractual Term, Exercisable Ending Balance   5 years 7 months 28 days
Aggregate Intrinsic Value, Exercisable Ending Balance | $   $ 0
Citius Oncology [Member]    
Schedule of Option Activity Under Our Stock Option Plans [Line Items]    
Option Shares, Outstanding balance | shares 18,100,000  
Weighted- Average Exercise Price, Outstanding balance | $ / shares $ 1.83  
Weighted- Average Remaining Contractual Term, Outstanding balance 8 years 2 months 15 days 7 years 3 months 7 days
Aggregate Intrinsic Value, Outstanding balance | $ $ 5,386,000  
Option Shares, Granted | shares  
Weighted- Average Exercise Price, Granted | $ / shares  
Option Shares, Forfeited or expired | shares  
Weighted- Average Exercise Price, Forfeited or expired | $ / shares  
Option Shares, Outstanding balance | shares   18,100,000
Weighted- Average Exercise Price, Outstanding balance | $ / shares   $ 1.83
Aggregate Intrinsic Value, Outstanding balance | $  
Option Shares, Exercisable Ending Balance | shares   11,316,667
Weighted- Average Exercise Price, Exercisable Ending Balance | $ / shares   $ 1.9
Weighted- Average Remaining Contractual Term, Exercisable Ending Balance   7 years 7 days
Aggregate Intrinsic Value, Exercisable Ending Balance | $