Nature of Operations	12 Months Ended
Dec. 31, 2021
Disclosure Text Block [Abstract]
Nature of Operations	1. NATURE OF OPERATIONS Business Finch Therapeutics Group, Inc. (the “Company” or “FTG”) was incorporated in 2017 as a Delaware corporation. The Company was formed as a result of a merger and recapitalization of Finch Therapeutics, Inc. (“Finch”) and Crestovo Holdings LLC (“Crestovo”) in September 2017 (the “Merger”), in which the former owners of Finch and Crestovo were issued equivalent stakes in the newly formed company, FTG. Crestovo was renamed Finch Therapeutics Holdings LLC in November 2020 (“Finch Holdings”). Finch and Finch Holdings are both wholly-owned subsidiaries of FTG. The Company is a clinical-stage microbiome therapeutics company leveraging its Human-First Discovery platform to develop a novel class of orally administered biological drugs. It is developing novel therapeutics designed to deliver missing microbes and their clinically relevant biochemical functions to correct dysbiosis and the diseases that emerge from it. The Company’s Human-First Discovery platform uses reverse translation to identify diseases of dysbiosis and to design microbiome therapeutics that address them. Its lead product candidate, CP101, is an orally administered complete microbiome therapeutic in development for the prevention of recurrent Clostridioides difficile infection, or CDI. Initial Public Offering On March 18, 2021, the Company completed its initial public offering (“IPO”) in which the Company issued and sold 7,500,000 shares of its common stock at a public offering price of $17.00 per share, for aggregate gross proceeds of $127.5 million and proceeds of $115.7 million after deducting underwriting discounts and commissions of $8.9 million and offering costs of $2.9 million. On April 20, 2021, the Company issued 192,877 additional shares of common stock, pursuant to the underwriters’ partial exercise of their overallotment option, at a public offering price of $17.00 per share for aggregate gross proceeds of $3.3 million and net proceeds of $3.0 million after deducting underwriting discounts, commissions and offering costs. In connection with the IPO, the Company’s board of directors (the “Board”) and stockholders approved an amended and restated certificate of incorporation to, among other things, effect a one-for-14.444 reverse stock split of the Company’s issued and outstanding shares of common stock and redeemable convertible preferred stock, as well as to effect a proportional adjustment to the existing conversion ratios for the Company’s redeemable convertible preferred stock. The reverse stock split was effected on March 12, 2021. Accordingly, all share and per share amounts of common stock for all periods presented in the accompanying audited consolidated financial statements and notes thereto have been retroactively adjusted, where applicable, to reflect this reverse stock split and adjustment of preferred stock conversion ratios. Upon the closing of the IPO, all of the then-outstanding shares of redeemable convertible preferred stock automatically converted into 31,253,609 shares of common stock at the applicable conversion ratio then in effect. Subsequent to the closing of the IPO, there were no shares of convertible preferred stock outstanding. Risks and Uncertainties The Company is subject to a number of risks similar to other companies in its industry, including rapid technological change, the risk that its products will fail to demonstrate efficacy in clinical trials, uncertainty of market acceptance of its products, competition from larger pharmaceutical and biotechnology companies and dependence on key personnel. The extent of the impact of the COVID-19 pandemic on the Company’s business, operations and clinical development timelines and plans remains uncertain, and will depend on certain developments, including the duration and spread of the outbreak, including with respect to variants of the virus, and its impact on clinical trial enrollment, trial sites, contract research organizations, contract manufacturing organizations, and other third parties with whom the Company does business, as well as its impact on regulatory authorities and its key scientific and management personnel. While the Company is experiencing limited financial impacts at this time, given the global economic slowdown, the overall disruption of global healthcare systems and the other risks and uncertainties associated with the pandemic, the Company’s business, financial condition and results of operations ultimately could be materially adversely affected. The Company continues to closely monitor the COVID-19 pandemic as it evolves its business continuity plans, clinical development plans and response strategy. At this time, it is unknown how long the adverse conditions associated with the COVID-19 pandemic will last and what the complete financial effect will be to the Company. Liquidity The Company has incurred recurring losses since its inception, including net losses of $58.2 million and $39.3 million for the years ended December 31, 2021 and 2020, respectively. In addition, as of December 31, 2021, the Company had an accumulated deficit of $161.0 million. The Company expects to continue to generate operating losses for the foreseeable future as it continues to develop its product candidates. The Company expects that its cash and cash equivalents of $133.5 million as of December 31, 2021, will be sufficient to fund its operating expenses and capital expenditure requirements for at least twelve months beyond the date of issuance the annual consolidated financial statements. The Company will not generate any future revenue from product sales unless and until it successfully completes clinical development and obtains regulatory approval for one or more of its product candidates. If the Company obtains regulatory approval for any of its product candidates, it expects to incur significant expenses related to developing its internal commercialization capability to support manufacturing, product sales, marketing and distribution. As a result, the Company will need substantial additional funding to support its operating activities as it advances its product candidates through clinical development, seeks regulatory approval, and if any of its product candidates are approved, proceeds to commercialization. Until such time as the Company can generate significant revenue from product sales, if ever, the Company expects to finance its operating activities through a combination of equity offerings, debt financings, and license and development agreements in connection with any future collaborations. Adequate funding may not be available to the Company on acceptable terms, or at all. If the Company is unable to obtain funding, the Company will be forced to delay, reduce or eliminate some or all of its research and development programs, product portfolio expansion or commercialization efforts, which could adversely affect its business prospects, or the Company may be unable to continue operations. Although management continues to pursue these plans, there is no assurance that the Company will be successful in obtaining sufficient funding on terms acceptable to the Company to fund continuing operations, if at all.

Nature of Operations

12 Months Ended

Dec. 31, 2021

1. NATURE OF OPERATIONS

Business

Finch Therapeutics Group, Inc. (the “Company” or “FTG”) was incorporated in 2017 as a Delaware corporation. The Company was formed as a result of a merger and recapitalization of Finch Therapeutics, Inc. (“Finch”) and Crestovo Holdings LLC (“Crestovo”) in September 2017 (the “Merger”), in which the former owners of Finch and Crestovo were issued equivalent stakes in the newly formed company, FTG. Crestovo was renamed Finch Therapeutics Holdings LLC in November 2020 (“Finch Holdings”). Finch and Finch Holdings are both wholly-owned subsidiaries of FTG.

The Company is a clinical-stage microbiome therapeutics company leveraging its Human-First Discovery platform to develop a novel class of orally administered biological drugs. It is developing novel therapeutics designed to deliver missing microbes and their clinically relevant biochemical functions to correct dysbiosis and the diseases that emerge from it. The Company’s Human-First Discovery platform uses reverse translation to identify diseases of dysbiosis and to design microbiome therapeutics that address them. Its lead product candidate, CP101, is an orally administered complete microbiome therapeutic in development for the prevention of recurrent Clostridioides difficile infection, or CDI.

Initial Public Offering

On March 18, 2021, the Company completed its initial public offering (“IPO”) in which the Company issued and sold 7,500,000 shares of its common stock at a public offering price of $17.00 per share, for aggregate gross proceeds of $127.5 million and proceeds of $115.7 million after deducting underwriting discounts and commissions of $8.9 million and offering costs of $2.9 million. On April 20, 2021, the Company issued 192,877 additional shares of common stock, pursuant to the underwriters’ partial exercise of their overallotment option, at a public offering price of $17.00 per share for aggregate gross proceeds of $3.3 million and net proceeds of $3.0 million after deducting underwriting discounts, commissions and offering costs.

In connection with the IPO, the Company’s board of directors (the “Board”) and stockholders approved an amended and restated certificate of incorporation to, among other things, effect a one-for-14.444 reverse stock split of the Company’s issued and outstanding shares of common stock and redeemable convertible preferred stock, as well as to effect a proportional adjustment to the existing conversion ratios for the Company’s redeemable convertible preferred stock. The reverse stock split was effected on March 12, 2021. Accordingly, all share and per share amounts of common stock for all periods presented in the accompanying audited consolidated financial statements and notes thereto have been retroactively adjusted, where applicable, to reflect this reverse stock split and adjustment of preferred stock conversion ratios. Upon the closing of the IPO, all of the then-outstanding shares of redeemable convertible preferred stock automatically converted into 31,253,609 shares of common stock at the applicable conversion ratio then in effect. Subsequent to the closing of the IPO, there were no shares of convertible preferred stock outstanding.

Risks and Uncertainties

The Company is subject to a number of risks similar to other companies in its industry, including rapid technological change, the risk that its products will fail to demonstrate efficacy in clinical trials, uncertainty of market acceptance of its products, competition from larger pharmaceutical and biotechnology companies and dependence on key personnel.

The extent of the impact of the COVID-19 pandemic on the Company’s business, operations and clinical development timelines and plans remains uncertain, and will depend on certain developments, including the duration and spread of the outbreak, including with respect to variants of the virus, and its impact on clinical trial enrollment, trial sites, contract research organizations, contract manufacturing organizations, and other third parties with whom the Company does business, as well as its impact on regulatory authorities and its key scientific and management personnel. While the Company is experiencing limited financial impacts at this time, given the global economic slowdown, the overall disruption of global healthcare systems and the other risks and uncertainties associated with the pandemic, the Company’s business, financial condition and results of operations ultimately could be materially adversely affected. The Company continues to closely

monitor the COVID-19 pandemic as it evolves its business continuity plans, clinical development plans and response strategy.

At this time, it is unknown how long the adverse conditions associated with the COVID-19 pandemic will last and what the complete financial effect will be to the Company.

Liquidity

The Company has incurred recurring losses since its inception, including net losses of $58.2 million and $39.3 million for the years ended December 31, 2021 and 2020, respectively. In addition, as of December 31, 2021, the Company had an accumulated deficit of $161.0 million. The Company expects to continue to generate operating losses for the foreseeable future as it continues to develop its product candidates. The Company expects that its cash and cash equivalents of $133.5 million as of December 31, 2021, will be sufficient to fund its operating expenses and capital expenditure requirements for at least twelve months beyond the date of issuance the annual consolidated financial statements.

The Company will not generate any future revenue from product sales unless and until it successfully completes clinical development and obtains regulatory approval for one or more of its product candidates. If the Company obtains regulatory approval for any of its product candidates, it expects to incur significant expenses related to developing its internal commercialization capability to support manufacturing, product sales, marketing and distribution. As a result, the Company will need substantial additional funding to support its operating activities as it advances its product candidates through clinical development, seeks regulatory approval, and if any of its product candidates are approved, proceeds to commercialization.

Until such time as the Company can generate significant revenue from product sales, if ever, the Company expects to finance its operating activities through a combination of equity offerings, debt financings, and license and development agreements in connection with any future collaborations. Adequate funding may not be available to the Company on acceptable terms, or at all. If the Company is unable to obtain funding, the Company will be forced to delay, reduce or eliminate some or all of its research and development programs, product portfolio expansion or commercialization efforts, which could adversely affect its business prospects, or the Company may be unable to continue operations. Although management continues to pursue these plans, there is no assurance that the Company will be successful in obtaining sufficient funding on terms acceptable to the Company to fund continuing operations, if at all.