Description of Business and Presentation of Financial Statements	6 Months Ended
	Jun. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business and Presentation of Financial Statements	DESCRIPTION OF BUSINESS AND PRESENTATION OF FINANCIAL STATEMENTS (a) Description of Business Tarsus Pharmaceuticals, Inc. (“Tarsus” or the “Company”) is a late clinical-stage biopharmaceutical company focused on the development and commercialization of novel therapeutic candidates to address large market opportunities initially in ophthalmic conditions where there are limited treatment alternatives. (b) Reverse Stock Split and Initial Public Offering On October 8, 2020, the Tarsus Board of Directors approved a 1-for-7.4276 reverse stock split and a certificate of amendment was filed to amend the Company's certificate of incorporation to effect this reverse split. The par value was not adjusted as a result of the reverse stock split. All share and per share information included in the accompanying financial statements give retroactive effect to this reverse stock split for all periods presented. On October 20, 2020, the Company completed its initial public offering ("IPO") through an underwritten sale of 6,325,000 shares of its common stock at a price of $16.00 per share, inclusive of an additional 825,000 shares of its common stock sold upon the full exercise of the underwriters’ purchase option. The aggregate net proceeds by the Company from the offering totaled $91.7 million, after deducting underwriting discounts and commissions and other offering expenses. Concurrent with the closing of the Company's IPO, all then-outstanding shares of its convertible preferred stock (see Note 4) were automatically converted into an aggregate of 11,107,018 issued shares of common stock. (c) Liquidity The Company currently has no product sales, and since inception, has accumulated losses and negative cash flows from operations (other than consideration received from an out-licensing agreement, as discussed in Note 9), resulting in an accumulated deficit of $16.1 million as of June 30, 2021 and $32.8 million as of December 31, 2020. The Company’s cash and cash equivalents were $176.7 million and $168.1 million as of June 30, 2021 and December 31, 2020, respectively. The Company has funded its inception-to-date operations primarily through equity capital raises and proceeds from its out-license agreement. The Company believes that its existing capital resources will be sufficient to meet projected operating requirements beyond at least 12 months from the August 5, 2021 filing date of this Form 10-Q. Accordingly, the accompanying financial statements in this Form 10-Q have been prepared on a going concern basis, which contemplates the realization of assets and satisfaction of liabilities in the normal course of business. The financial statements do not include any adjustments relating to the recoverability and classification of recorded asset amounts or the amounts and classification of liabilities that might result from the outcome of this uncertainty. The Company’s operations currently consist of its corporate organization build-out, intellectual property licensing activities, and conducting preclinical and clinical studies. The Company faces the clinical, business, and liquidity risks that are typically associated with early-stage biotechnology companies; it must complete expensive research and development activities, achieve research and development outcomes that are inherently uncertain, recruit and retain skilled personnel (including executive management), and build and defend its intellectual property rights. Management expects to continue to incur additional substantial losses in the foreseeable future as a result of the Company’s research and development activities and other operating expenses. The Company will be required to raise additional capital to fund its future operations, however, no assurance can be given as to whether financing will be available on terms acceptable to the Company, if at all. If the Company raises additional funds by issuing equity securities, its stockholders may experience dilution. Any future debt financing into which the Company enters may impose additional covenants that restrict operations, including limitations on its ability to incur liens or additional debt, pay dividends, repurchase common stock, make certain investments, or engage in certain merger, consolidation or asset sale transactions. Any debt financing or additional equity raise may contain terms that are not favorable to the Company or its stockholders. The Company’s potential inability to raise capital when needed could have a negative impact on its financial condition and ability to pursue planned business strategies. If the Company is unable to raise additional funds as required, it may need to delay, reduce, or terminate some or all its development programs and clinical trials. The Company may also be required to sell or license its rights to product candidates in certain territories or indications that it would otherwise prefer to develop and commercialize on its own. If the Company is required to enter into collaborations and other arrangements to address its liquidity needs, it may have to give up certain rights that limit its ability to develop and commercialize product candidates or may have other terms that are not favorable to the Company or its stockholders, which could materially and adversely affect its business and financial prospects. These factors may adversely impact the Company's ability to achieve its business objectives and would likely have an adverse effect on its future business prospects, or even its ability to remain a going concern. (d) Operating Segment To date, the Company has operated and managed its business and financial information on an aggregate basis for the purposes of evaluating financial performance and the allocation of capital and personnel resources. Accordingly, the Company’s management determined that it operates in one reportable operating segment. This single segment is focused exclusively on developing pharmaceutical products for eventual commercialization. (e) Emerging Growth Company Status The Company is an emerging growth company, as defined in the Jumpstart Our Business Startups Act of 2012 (the "JOBS Act"). Under the JOBS Act, emerging growth companies can delay adopting new or revised accounting standards issued subsequent to the enactment of the JOBS Act until such time as those standards apply to private companies. The Company has irrevocably elected to not take this exemption and, as a result, will adopt new or revised accounting standards on the relevant effective dates on which adoption of such standards is required for other public companies that are not emerging growth companies.