Nature of Operations, Basis of Presentation and Summary of Significant Accounting Policies (Policies)	3 Months Ended
Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Preparation	Basis of Preparation — The accompanying condensed consolidated financial statements include the operations of Citius Pharmaceuticals, Inc., and its wholly-owned subsidiaries, Citius Pharmaceuticals, LLC, and LMB. All significant inter-company balances and transactions have been eliminated in consolidation. The accompanying unaudited condensed consolidated financial statements of the Company have been prepared on the same basis as the annual consolidated financial statements and, in the opinion of management, reflect all adjustments, which include only normal recurring adjustments, necessary to fairly state the condensed consolidated financial position of the Company as of December 31, 2019, the results of its operations and cash flows for the three-month periods ended December 31, 2019 and 2018, and are not necessarily indicative of the results that may be expected for the year ending September 30, 2020. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company's Annual Report on Form 10-K for the year ended September 30, 2019 filed with the Securities and Exchange Commission.
Recently Adopted Accounting Standards	*Recently Adopted Accounting Standards* In February 2016, the FASB issued Accounting Standards Update ("ASU") No. 2016-02, Leases (Topic 842). ASU 2016-02 requires a lessee to record a right-of-use asset and a corresponding lease liability, initially measured at the present value of the lease payments, on the balance sheet for all leases with terms longer than 12 months, as well as the disclosure of key information about leasing arrangements. Leases will be classified as either finance leases or operating leases, with classification affecting the pattern of expense recognition in the statement of operations. In January, July and December 2018, the FASB issued ASU No's. 2018-01, 2018-10, 2018-11, 2018-20 and 2019-01, which were targeted improvements to ASU No. 2016-02 (collectively, with ASU No. 2016-02, "ASC 842") and provided entities with an additional (and optional) transition method to adopt the new lease standard, and provided clarifications to address potential narrow-scope implementation issues. The Company adopted ASU 2016- 02 effective October 1, 2019 and elected the optional transition method for adoption. The Company also took advantage of the transition package of practical expedients permitted within ASU 2016-02, which among other things, allowed it to carryforward historical lease classifications. The Company also elected to keep leases with an initial term of 12 months or less off of the balance sheet as a policy election and will recognize those lease payments in the consolidated statements of operations on a straight-line basis over the lease term. As of the adoption date, the Company identified one operating lease arrangement in which it is a lessee. The adoption of this ASU resulted in the recognition of a right-of-use asset and lease liability of $1,137,724. In June 2018, the FASB issued ASU No. 2018-07, Compensation - Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting which is intended to reduce cost and complexity and to improve financial reporting for nonemployee share-based payments. The amendment is effective for fiscal years beginning after December 15, 2018, including interim periods within that fiscal year. The Company adopted ASU 2018-07 on October 1, 2019 and it did not have a material effect on the Company's financial position, results of operations or disclosures. There have been no other recently issued accounting pronouncements that have had or are expected to have a material impact on the Company's consolidated financial statements.
Use of Estimates	Use of Estimates — Our accounting principles require our management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of assets and liabilities at the date of the financial statements, and reported amounts of revenues and expenses during the reporting period. Estimates having relatively higher significance include stock-based compensation, accounting for leases, valuation of warrants, and income taxes. Actual results could differ from those estimates and changes in estimates may occur.
Basic and Diluted Net Loss per Common Share	Basic and Diluted Net Loss per Common Share — Basic and diluted net loss per common share is computed by dividing net loss in each period by the weighted average number of shares of common stock outstanding during such period. For the periods presented, common stock equivalents, consisting of stock options and warrants were not included in the calculation of the diluted loss per share because they were anti-dilutive.

Nature of Operations, Basis of Presentation and Summary of Significant Accounting Policies (Policies)

3 Months Ended

Dec. 31, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Preparation — The accompanying condensed consolidated financial statements include the operations of Citius Pharmaceuticals, Inc., and its wholly-owned subsidiaries, Citius Pharmaceuticals, LLC, and LMB. All significant inter-company balances and transactions have been eliminated in consolidation.

The accompanying unaudited condensed consolidated financial statements of the Company have been prepared on the same basis as the annual consolidated financial statements and, in the opinion of management, reflect all adjustments, which include only normal recurring adjustments, necessary to fairly state the condensed consolidated financial position of the Company as of December 31, 2019, the results of its operations and cash flows for the three-month periods ended December 31, 2019 and 2018, and are not necessarily indicative of the results that may be expected for the year ending September 30, 2020. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company's Annual Report on Form 10-K for the year ended September 30, 2019 filed with the Securities and Exchange Commission.

Recently Adopted Accounting Standards

Recently Adopted Accounting Standards

In February 2016, the FASB issued Accounting Standards Update ("ASU") No. 2016-02, Leases (Topic 842). ASU 2016-02 requires a lessee to record a right-of-use asset and a corresponding lease liability, initially measured at the present value of the lease payments, on the balance sheet for all leases with terms longer than 12 months, as well as the disclosure of key information about leasing arrangements. Leases will be classified as either finance leases or operating leases, with classification affecting the pattern of expense recognition in the statement of operations. In January, July and December 2018, the FASB issued ASU No's. 2018-01, 2018-10, 2018-11, 2018-20 and 2019-01, which were targeted improvements to ASU No. 2016-02 (collectively, with ASU No. 2016-02, "ASC 842") and provided entities with an additional (and optional) transition method to adopt the new lease standard, and provided clarifications to address potential narrow-scope implementation issues. The Company adopted ASU 2016- 02 effective October 1, 2019 and elected the optional transition method for adoption. The Company also took advantage of the transition package of practical expedients permitted within ASU 2016-02, which among other things, allowed it to carryforward historical lease classifications. The Company also elected to keep leases with an initial term of 12 months or less off of the balance sheet as a policy election and will recognize those lease payments in the consolidated statements of operations on a straight-line basis over the lease term. As of the adoption date, the Company identified one operating lease arrangement in which it is a lessee. The adoption of this ASU resulted in the recognition of a right-of-use asset and lease liability of $1,137,724.

In June 2018, the FASB issued ASU No. 2018-07, Compensation - Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting which is intended to reduce cost and complexity and to improve financial reporting for nonemployee share-based payments. The amendment is effective for fiscal years beginning after December 15, 2018, including interim periods within that fiscal year. The Company adopted ASU 2018-07 on October 1, 2019 and it did not have a material effect on the Company's financial position, results of operations or disclosures.

There have been no other recently issued accounting pronouncements that have had or are expected to have a material impact on the Company's consolidated financial statements.

Use of Estimates

Use of Estimates — Our accounting principles require our management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of assets and liabilities at the date of the financial statements, and reported amounts of revenues and expenses during the reporting period. Estimates having relatively higher significance include stock-based compensation, accounting for leases, valuation of warrants, and income taxes. Actual results could differ from those estimates and changes in estimates may occur.

Basic and Diluted Net Loss per Common Share

Basic and Diluted Net Loss per Common Share — Basic and diluted net loss per common share is computed by dividing net loss in each period by the weighted average number of shares of common stock outstanding during such period. For the periods presented, common stock equivalents, consisting of stock options and warrants were not included in the calculation of the diluted loss per share because they were anti-dilutive.