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Summary of Significant Accounting Policies (Details) | 12 Months Ended
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Sep. 30, 2025 USD ($) | Sep. 30, 2024 USD ($)
Summary of Significant Accounting Policies [Line Items] |  |
Prepaid insurance | $ 64,210 | $ 0
Advance payments | 1,331,280 | 2,700,000
Prepaid manufacturing costs | 1,368,720 | $ 6,134,895
In-process research and development | $ 19,400,000 |
Amortized straight line basis over period | 8 years |
CODM, individual title and position or group name | Chief Executive Officer |
Description of CODM | The CODM evaluates the performance of the operating segment and allocates resources based on amounts as reported on the consolidated statements of operations and cash flows. Segment expenses are presented on the Company’s consolidated statements of operations. |
Reportable segment | 1 |
Citius Oncology’s [Member] |  |
Summary of Significant Accounting Policies [Line Items] |  |
Research and development | $ 73,400,000 |
Non-Hodgkin Lymphoma [Member] |  |
Summary of Significant Accounting Policies [Line Items] |  |
Amortized straight line basis over period | 12 years |
Dr. Reddy’s [Member] |  |
Summary of Significant Accounting Policies [Line Items] |  |
Research and development | $ 40,000,000 |
Milestone fees | 27,500,000 |
Eisai [Member] |  |
Summary of Significant Accounting Policies [Line Items] |  |
Milestone fees | $ 5,900,000 |

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