Nature of Business and Basis of Presentation	12 Months Ended
Dec. 31, 2020
Text Block [Abstract]
Nature of Business and Basis of Presentation	1. Nature of Business and Basis of Presentation Relay Therapeutics, Inc. (the “Company”) was incorporated in Delaware on May 4, 2015 and is headquartered in Cambridge, Massachusetts. The Company is a clinical-stage, precision medicines company transforming the drug discovery process with an initial focus on enhancing small molecule therapeutic discovery in targeted oncology. The Company is built upon unparalleled insights into protein motion and how this dynamic behavior relates to protein function. The Company’s Dynamo platform integrates an array of leading edge experimental and computational approaches, which allows the Company to apply the understanding of protein structure and motion to drug discovery. The Company is advancing its pipeline of medicines to address targets in precision oncology, including its lead product candidates, RLY-4008 and RLY-1971, as well as its PI3Kα mutant selective program, known as the RLY-PI3K1047 program. The Company initiated a Phase 1 clinical trial for RLY-1971 in patients with advanced solid tumors in the first quarter of 2020 and a first-in-human clinical trial of RLY-4008 enriched for patients with advanced solid tumors having oncogenic FGFR2 alterations in the third quarter of 2020. In December 2020, the Company entered into the Collaboration and License Agreement (the “Genentech Agreement”) with Genentech, Inc. (“Genentech”), a member of the Roche Group, for the development and commercialization of RLY-1971, as further discussed in Note 5. The Company is subject to risks common to companies in the biotechnology industry including, but not limited to, new technological innovations, protection of proprietary technology, dependence on key personnel, compliance with government regulations and the need to obtain additional financing. Product candidates currently under development will require significant additional research and development efforts, including extensive pre-clinical and clinical testing and regulatory approval, prior to commercialization. These efforts require significant amounts of additional capital, adequate personnel infrastructure and extensive compliance-reporting capabilities. The Company’s product candidates are in development. There can be no assurance that the Company’s research and development will be successfully completed, that adequate protection for the Company’s intellectual property will be obtained, that any products developed will obtain necessary government regulatory approval or that any approved products will be commercially viable. Even if the Company’s product development efforts are successful, it is uncertain when, if ever, the Company will generate significant revenue from product sales. The Company operates in an environment of rapid change in technology and substantial competition from pharmaceutical and biotechnology companies. In addition, the Company is dependent upon the services of its employees and consultants. The Company has devoted substantially all of its resources to developing its product candidates, including RLY-1971 and RLY-4008, and the RLY-PI3K1047 program by developing its innovative, experimental and computational approaches on protein motion, building its intellectual property portfolio, business planning, raising capital and providing general and administrative support for these operations. The Company has incurred net operating losses since inception and had an accumulated deficit of $404,228 as of December 31, 2020. The Company expects that its existing cash, cash equivalents and investments as of December 31, 2020, together with the upfront payment of $75,000 received in January 2021 from Genentech under the Genentech Agreement discussed in Note 5, will enable it to fund its planned operating expenses and capital expenditure requirements for at least one year from the date of the issuance of these consolidated financial statements. The future viability of the Company is dependent on its ability to generate cash from operating activities or to raise additional capital to finance its operations. The Company’s failure to raise capital as and when needed could have a material adverse effect on its financial condition and ability to pursue its business strategies. The Company may not be able to obtain financing on acceptable terms, or at all, and the Company may not be able to enter into license or collaboration arrangements or obtain government grants. The terms of any financing may adversely affect the holdings or the rights of the Company’s stockholders. If the Company is unable to obtain funding, the Company could be forced to delay, reduce or eliminate its research and development programs, product portfolio expansion or commercialization efforts, which could adversely affect its business prospects. In the event the Company requires additional funding, there can be no assurance that it will be successful in obtaining sufficient funding on terms acceptable to the Company to fund its continuing operations, if at all. Initial Public Offering On July 20, 2020, the Company closed its initial public offering (“IPO”) and issued 23,000,000 shares of its common stock at a price of $20.00 per share for net proceeds of $425,293, after deducting underwriting discounts and commissions of $32,200 and expenses of $2,507. In connection with the IPO, all shares of Series A, Series B and Series C convertible preferred stock converted into 61,992,534 shares of common stock. Reverse Stock Split On July 8, 2020, the Company’s stockholders approved a decrease in the number of authorized shares of common stock from 260,000,000 to 150,000,000. The Company also effected a one-for-3.55092 reverse stock split of its issued and outstanding shares of common stock and a proportional adjustment to the existing conversion ratios for each series of the Company’s preferred stock. Accordingly, all share and per share amounts for all periods presented in the accompanying financial statements and notes thereto have been adjusted retroactively, where applicable, to reflect this reverse stock split and adjustment of the preferred stock conversion ratios.

Nature of Business and Basis of Presentation

12 Months Ended

Dec. 31, 2020

Nature of Business and Basis of Presentation

1. Nature of Business and Basis of Presentation

Relay Therapeutics, Inc. (the “Company”) was incorporated in Delaware on May 4, 2015 and is headquartered in Cambridge, Massachusetts. The Company is a clinical-stage, precision medicines company transforming the drug discovery process with an initial focus on enhancing small molecule therapeutic discovery in targeted oncology. The Company is built upon unparalleled insights into protein motion and how this dynamic behavior relates to protein function. The Company’s Dynamo platform integrates an array of leading edge experimental and computational approaches, which allows the Company to apply the understanding of protein structure and motion to drug discovery. The Company is advancing its pipeline of medicines to address targets in precision oncology, including its lead product candidates, RLY-4008 and RLY-1971, as well as its PI3Kα mutant selective program, known as the RLY-PI3K1047 program. The Company initiated a Phase 1 clinical trial for RLY-1971 in patients with advanced solid tumors in the first quarter of 2020 and a first-in-human clinical trial of RLY-4008 enriched for patients with advanced solid tumors having oncogenic FGFR2 alterations in the third quarter of 2020. In December 2020, the Company entered into the Collaboration and License Agreement (the “Genentech Agreement”) with Genentech, Inc. (“Genentech”), a member of the Roche Group, for the development and commercialization of RLY-1971, as further discussed in Note 5.

The Company is subject to risks common to companies in the biotechnology industry including, but not limited to, new technological innovations, protection of proprietary technology, dependence on key personnel, compliance with government regulations and the need to obtain additional financing. Product candidates currently under development will require significant additional research and development efforts, including extensive pre-clinical and clinical testing and regulatory approval, prior to commercialization. These efforts require significant amounts of additional capital, adequate personnel infrastructure and extensive compliance-reporting capabilities.

The Company’s product candidates are in development. There can be no assurance that the Company’s research and development will be successfully completed, that adequate protection for the Company’s intellectual property will be obtained, that any products developed will obtain necessary government regulatory approval or that any approved products will be commercially viable. Even if the Company’s product development efforts are successful, it is uncertain when, if ever, the Company will generate significant revenue from product sales. The Company operates in an environment of rapid change in technology and substantial competition from pharmaceutical and biotechnology companies. In addition, the Company is dependent upon the services of its employees and consultants.

The Company has devoted substantially all of its resources to developing its product candidates, including RLY-1971 and RLY-4008, and the RLY-PI3K1047 program by developing its innovative, experimental and computational approaches on protein motion, building its intellectual property portfolio, business planning, raising capital and providing general and administrative support for these operations.

The Company has incurred net operating losses since inception and had an accumulated deficit of $404,228 as of December 31, 2020. The Company expects that its existing cash, cash equivalents and investments as of December 31, 2020, together with the upfront payment of $75,000 received in January 2021 from Genentech under the Genentech Agreement discussed in Note 5, will enable it to fund its planned operating expenses and capital expenditure requirements for at least one year from the date of the issuance of these consolidated financial statements. The future viability of the Company is dependent on its ability to generate cash from operating activities or to raise additional capital to finance its operations. The Company’s failure to raise capital as and when needed could have a material adverse effect on its financial condition and ability to pursue its business strategies. The Company may not be able to obtain financing on acceptable terms, or at all, and the Company may not be able to enter into license or collaboration arrangements or obtain government grants. The terms of any financing may adversely affect the holdings or the rights of the Company’s stockholders. If the Company is unable to obtain funding, the Company could be forced to delay, reduce or eliminate its research and development programs, product portfolio expansion or commercialization efforts, which could adversely affect its business prospects. In the event the Company requires additional funding, there can be no assurance that it will be successful in obtaining sufficient funding on terms acceptable to the Company to fund its continuing operations, if at all.

Initial Public Offering

On July 20, 2020, the Company closed its initial public offering (“IPO”) and issued 23,000,000 shares of its common stock at a price of $20.00 per share for net proceeds of $425,293, after deducting underwriting discounts and commissions of $32,200 and expenses of $2,507. In connection with the IPO, all shares of Series A, Series B and Series C convertible preferred stock converted into 61,992,534 shares of common stock.

Reverse Stock Split

On July 8, 2020, the Company’s stockholders approved a decrease in the number of authorized shares of common stock from 260,000,000 to 150,000,000. The Company also effected a one-for-3.55092 reverse stock split of its issued and outstanding shares of common stock and a proportional adjustment to the existing conversion ratios for each series of the Company’s preferred stock. Accordingly, all share and per share amounts for all periods presented in the accompanying financial statements and notes thereto have been adjusted retroactively, where applicable, to reflect this reverse stock split and adjustment of the preferred stock conversion ratios.